Increase field limit for OTel metrics to 10 000 (#120591) (#120612)

The default field limit of 1000 seems undersized, especially for the default data stream.
Each distinct attribute/dimension name and metric name count towards that limit

Author: felixbarny

docs/changelog/120591.yaml

@@ -0,0 +1,5 @@
+pr: 120591
+summary: Increase field limit for OTel metrics to 10 000
+area: TSDB
+type: enhancement
+issues: []

x-pack/plugin/otel-data/src/main/resources/component-templates/[email protected]

@@ -5,6 +5,7 @@ _meta:
 template:
   settings:
     index.mapping.ignore_malformed: true
+    index.mapping.total_fields.limit: 10000
   mappings:
     properties:
       start_timestamp:

x-pack/plugin/otel-data/src/main/resources/resources.yaml

@@ -1,7 +1,7 @@
 # "version" holds the version of the templates and ingest pipelines installed
 # by xpack-plugin otel-data. This must be increased whenever an existing template is
 # changed, in order for it to be updated on Elasticsearch upgrade.
-version: 7
+version: 8
 
 component-templates:
   - otel@mappings