[chore][receiver/haproxyreceiver] sort metadata.yaml entries (open-telemetry#43468)

#### Description

Sort metadata.yaml file in preparation for sort validation using
mdatagen. Context:
open-telemetry/opentelemetry-collector#13782

Signed-off-by: Paulo Dias <[email protected]>

Author: paulojmdias

receiver/haproxyreceiver/metadata.yaml

@@ -54,46 +54,6 @@ metrics:
       value_type: int
       input_type: string
     unit: "{servers}"
-  haproxy.connections.rate:
-    description: Number of connections over the last elapsed second (frontend). Corresponds to HAProxy's `conn_rate` metric.
-    stability:
-      level: development
-    enabled: true
-    gauge:
-      value_type: int
-      input_type: string
-    unit: "{connections}"
-  haproxy.sessions.count:
-    description: Current sessions. Corresponds to HAProxy's `scur` metric.
-    stability:
-      level: development
-    enabled: true
-    gauge:
-      value_type: int
-      input_type: string
-    unit: "{sessions}"
-  haproxy.connections.total:
-    description: Cumulative number of connections (frontend). Corresponds to HAProxy's `conn_tot` metric.
-    stability:
-      level: development
-    enabled: false
-    sum:
-      aggregation_temporality: cumulative
-      monotonic: true
-      value_type: int
-      input_type: string
-    unit: "{connections}"
-  haproxy.server_selected.total:
-    description: Number of times a server was selected, either for new sessions or when re-dispatching. Corresponds to HAProxy's `lbtot` metric.
-    stability:
-      level: development
-    enabled: true
-    sum:
-      aggregation_temporality: cumulative
-      monotonic: true
-      value_type: int
-      input_type: string
-    unit: "{selections}"
   haproxy.bytes.input:
     description: Bytes in. Corresponds to HAProxy's `bin` metric.
     stability:
@@ -138,6 +98,17 @@ metrics:
       value_type: int
       input_type: string
     unit: by
+  haproxy.compression.count:
+    description: Number of HTTP responses that were compressed. Corresponds to HAProxy's `comp_rsp` metric.
+    stability:
+      level: development
+    enabled: false
+    sum:
+      aggregation_temporality: cumulative
+      monotonic: true
+      value_type: int
+      input_type: string
+    unit: "{responses}"
   haproxy.compression.input:
     description: Number of HTTP response bytes fed to the compressor. Corresponds to HAProxy's `comp_in` metric.
     stability:
@@ -160,19 +131,37 @@ metrics:
       value_type: int
       input_type: string
     unit: by
-  haproxy.compression.count:
-    description: Number of HTTP responses that were compressed. Corresponds to HAProxy's `comp_rsp` metric.
+  haproxy.connections.average_time:
+    description: Average connect time in ms over the 1024 last requests. Corresponds to HAProxy's `ctime` metric.
     stability:
       level: development
     enabled: false
+    gauge:
+      value_type: double
+      input_type: string
+    unit: ms
+  haproxy.connections.errors:
+    description: Number of requests that encountered an error trying to connect to a backend server. The backend stat is the sum of the stat. Corresponds to HAProxy's `econ` metric
+    stability:
+      level: development
+    enabled: true
     sum:
       aggregation_temporality: cumulative
       monotonic: true
       value_type: int
       input_type: string
-    unit: "{responses}"
-  haproxy.requests.denied:
-    description: Requests denied because of security concerns. Corresponds to HAProxy's `dreq` metric
+    unit: "{errors}"
+  haproxy.connections.rate:
+    description: Number of connections over the last elapsed second (frontend). Corresponds to HAProxy's `conn_rate` metric.
+    stability:
+      level: development
+    enabled: true
+    gauge:
+      value_type: int
+      input_type: string
+    unit: "{connections}"
+  haproxy.connections.retries:
+    description: Number of times a connection to a server was retried. Corresponds to HAProxy's `wretr` metric.
     stability:
       level: development
     enabled: true
@@ -181,20 +170,20 @@ metrics:
       monotonic: true
       value_type: int
       input_type: string
-    unit: "{requests}"
-  haproxy.responses.denied:
-    description: Responses denied because of security concerns. Corresponds to HAProxy's `dresp` metric
+    unit: "{retries}"
+  haproxy.connections.total:
+    description: Cumulative number of connections (frontend). Corresponds to HAProxy's `conn_tot` metric.
     stability:
       level: development
-    enabled: true
+    enabled: false
     sum:
       aggregation_temporality: cumulative
       monotonic: true
       value_type: int
       input_type: string
-    unit: "{responses}"
+    unit: "{connections}"
   haproxy.downtime:
-    description:  Total downtime (in seconds). The value for the backend is the downtime for the whole backend, not the sum of the server downtime. Corresponds to HAProxy's `downtime` metric
+    description: Total downtime (in seconds). The value for the backend is the downtime for the whole backend, not the sum of the server downtime. Corresponds to HAProxy's `downtime` metric
     stability:
       level: development
     enabled: false
@@ -204,19 +193,28 @@ metrics:
       value_type: int
       input_type: string
     unit: s
-  haproxy.connections.errors:
-    description: Number of requests that encountered an error trying to connect to a backend server. The backend stat is the sum of the stat. Corresponds to HAProxy's `econ` metric
+  haproxy.failed_checks:
+    description: Number of failed checks. (Only counts checks failed when the server is up). Corresponds to HAProxy's `chkfail` metric.
     stability:
       level: development
-    enabled: true
+    enabled: false
     sum:
       aggregation_temporality: cumulative
       monotonic: true
       value_type: int
       input_type: string
-    unit: "{errors}"
-  haproxy.requests.errors:
-    description: Cumulative number of request errors. Corresponds to HAProxy's `ereq` metric.
+    unit: "{checks}"
+  haproxy.requests.average_time:
+    description: Average queue time in ms over the 1024 last requests. Corresponds to HAProxy's `qtime` metric.
+    stability:
+      level: development
+    enabled: false
+    gauge:
+      value_type: double
+      input_type: string
+    unit: ms
+  haproxy.requests.denied:
+    description: Requests denied because of security concerns. Corresponds to HAProxy's `dreq` metric
     stability:
       level: development
     enabled: true
@@ -225,28 +223,38 @@ metrics:
       monotonic: true
       value_type: int
       input_type: string
-    unit: "{errors}"
-  haproxy.responses.errors:
-    description: Cumulative number of response errors. Corresponds to HAProxy's `eresp` metric, `srv_abrt` will be counted here also.
+    unit: "{requests}"
+  haproxy.requests.errors:
+    description: Cumulative number of request errors. Corresponds to HAProxy's `ereq` metric.
     stability:
       level: development
     enabled: true
     sum:
       aggregation_temporality: cumulative
       monotonic: true
       value_type: int
+      input_type: string
     unit: "{errors}"
-  haproxy.failed_checks:
-    description: Number of failed checks. (Only counts checks failed when the server is up). Corresponds to HAProxy's `chkfail` metric.
+  haproxy.requests.queued:
+    description: Current queued requests. For the backend this reports the number queued without a server assigned. Corresponds to HAProxy's `qcur` metric.
     stability:
       level: development
-    enabled: false
+    enabled: true
     sum:
       aggregation_temporality: cumulative
       monotonic: true
       value_type: int
       input_type: string
-    unit: "{checks}"
+    unit: "{requests}"
+  haproxy.requests.rate:
+    description: HTTP requests per second over last elapsed second. Corresponds to HAProxy's `req_rate` metric.
+    stability:
+      level: development
+    enabled: true
+    gauge:
+      value_type: double
+      input_type: string
+    unit: "{requests}"
   haproxy.requests.redispatched:
     description: Number of times a request was redispatched to another server. Corresponds to HAProxy's `wredis` metric.
     stability:
@@ -271,8 +279,17 @@ metrics:
     unit: "{requests}"
     attributes:
       - status_code
-  haproxy.connections.retries:
-    description: Number of times a connection to a server was retried. Corresponds to HAProxy's `wretr` metric.
+  haproxy.responses.average_time:
+    description: Average response time in ms over the 1024 last requests. Corresponds to HAProxy's `rtime` metric.
+    stability:
+      level: development
+    enabled: false
+    gauge:
+      value_type: double
+      input_type: string
+    unit: ms
+  haproxy.responses.denied:
+    description: Responses denied because of security concerns. Corresponds to HAProxy's `dresp` metric
     stability:
       level: development
     enabled: true
@@ -281,20 +298,19 @@ metrics:
       monotonic: true
       value_type: int
       input_type: string
-    unit: "{retries}"
-  haproxy.sessions.total:
-    description: Cumulative number of sessions. Corresponds to HAProxy's `stot` metric.
+    unit: "{responses}"
+  haproxy.responses.errors:
+    description: Cumulative number of response errors. Corresponds to HAProxy's `eresp` metric, `srv_abrt` will be counted here also.
     stability:
       level: development
-    enabled: false
+    enabled: true
     sum:
       aggregation_temporality: cumulative
       monotonic: true
       value_type: int
-      input_type: string
-    unit: "{sessions}"
-  haproxy.requests.queued:
-    description: Current queued requests. For the backend this reports the number queued without a server assigned. Corresponds to HAProxy's `qcur` metric.
+    unit: "{errors}"
+  haproxy.server_selected.total:
+    description: Number of times a server was selected, either for new sessions or when re-dispatching. Corresponds to HAProxy's `lbtot` metric.
     stability:
       level: development
     enabled: true
@@ -303,16 +319,7 @@ metrics:
       monotonic: true
       value_type: int
       input_type: string
-    unit: "{requests}"
-  haproxy.requests.rate:
-    description: HTTP requests per second over last elapsed second. Corresponds to HAProxy's `req_rate` metric.
-    stability:
-      level: development
-    enabled: true
-    gauge:
-      value_type: double
-      input_type: string
-    unit: "{requests}"
+    unit: "{selections}"
   haproxy.sessions.average:
     description: Average total session time in ms over the last 1024 requests. Corresponds to HAProxy's `ttime` metric.
     stability:
@@ -322,57 +329,50 @@ metrics:
       value_type: double
       input_type: string
     unit: ms
-  haproxy.sessions.rate:
-    description: Number of sessions per second over last elapsed second. Corresponds to HAProxy's `rate` metric.
+  haproxy.sessions.count:
+    description: Current sessions. Corresponds to HAProxy's `scur` metric.
     stability:
       level: development
     enabled: true
     gauge:
-      value_type: double
+      value_type: int
       input_type: string
     unit: "{sessions}"
-  haproxy.weight:
-    description: Total effective weight (backend) or effective weight (server). Corresponds to HAProxy's `weight` metric.
+  haproxy.sessions.limit:
+    description: Configured session limit. Corresponds to HAProxy's `slim` metric.
     stability:
       level: development
     enabled: false
     gauge:
       value_type: int
       input_type: string
-    unit: "1"
-  haproxy.connections.average_time:
-    description: Average connect time in ms over the 1024 last requests. Corresponds to HAProxy's `ctime` metric.
-    stability:
-      level: development
-    enabled: false
-    gauge:
-      value_type: double
-      input_type: string
-    unit: ms
-  haproxy.requests.average_time:
-    description: Average queue time in ms over the 1024 last requests. Corresponds to HAProxy's `qtime` metric.
+    unit: "{sessions}"
+  haproxy.sessions.rate:
+    description: Number of sessions per second over last elapsed second. Corresponds to HAProxy's `rate` metric.
     stability:
       level: development
-    enabled: false
+    enabled: true
     gauge:
       value_type: double
       input_type: string
-    unit: ms
-  haproxy.responses.average_time:
-    description: Average response time in ms over the 1024 last requests. Corresponds to HAProxy's `rtime` metric.
+    unit: "{sessions}"
+  haproxy.sessions.total:
+    description: Cumulative number of sessions. Corresponds to HAProxy's `stot` metric.
     stability:
       level: development
     enabled: false
-    gauge:
-      value_type: double
+    sum:
+      aggregation_temporality: cumulative
+      monotonic: true
+      value_type: int
       input_type: string
-    unit: ms
-  haproxy.sessions.limit:
-    description: Configured session limit. Corresponds to HAProxy's `slim` metric.
+    unit: "{sessions}"
+  haproxy.weight:
+    description: Total effective weight (backend) or effective weight (server). Corresponds to HAProxy's `weight` metric.
     stability:
       level: development
     enabled: false
     gauge:
       value_type: int
       input_type: string
-    unit: "{sessions}"
+    unit: "1"