Fix test cases after figuring out how to run them

Author: pabloem

x-pack/plugin/esql/qa/testFixtures/src/main/resources/k8s-timeseries.csv-spec

@@ -279,18 +279,19 @@ sum_over_time
 required_capability: metrics_command
 required_capability: sum_over_time
 
-TS k8s | STATS cost=sum(sum_over_time(network.cost)) BY cluster, time_bucket = bucket(@timestamp,1minute) | SORT cost DESC, time_bucket DESC, cluster | LIMIT 10;
+TS k8s | STATS sum_cost=sum(sum_over_time(network.cost)) BY cluster, time_bucket = bucket(@timestamp,1minute) | SORT sum_cost DESC, time_bucket DESC, cluster | LIMIT 10;
+
+sum_cost:double | cluster:keyword | time_bucket:datetime
+    67.625      | qa              | 2024-05-10T00:17:00.000Z
+    65.75       | staging         | 2024-05-10T00:09:00.000Z
+    48.125      | qa              | 2024-05-10T00:09:00.000Z
+    48.125      | qa              | 2024-05-10T00:06:00.000Z
+    41.25       | qa              | 2024-05-10T00:11:00.000Z
+    38.875      | qa              | 2024-05-10T00:04:00.000Z
+    38.0        | qa              | 2024-05-10T00:15:00.000Z
+    37.5        | prod            | 2024-05-10T00:09:00.000Z
+    36.75       | qa              | 2024-05-10T00:08:00.000Z
+    32.25       | qa              | 2024-05-10T00:18:00.000Z
 
-cost:double | cluster:keyword | time_bucket:datetime
-12.375          | prod            | 2024-05-10T00:17:00.000Z
-12.375          | qa              | 2024-05-10T00:01:00.000Z
-12.25           | prod            | 2024-05-10T00:19:00.000Z
-12.125          | qa              | 2024-05-10T00:07:00.000Z
-12.125          | staging         | 2024-05-10T00:03:00.000Z
-11.875          | prod            | 2024-05-10T00:15:00.000Z
-11.875          | qa              | 2024-05-10T00:09:00.000Z
-11.75           | qa              | 2024-05-10T00:06:00.000Z
-11.625          | prod            | 2024-05-10T00:12:00.000Z
-11.5            | staging         | 2024-05-10T00:16:00.000Z
 ;
 

x-pack/plugin/src/yamlRestTest/resources/rest-api-spec/test/esql/60_usage.yml

@@ -123,7 +123,7 @@ setup:
   - match: {esql.functions.coalesce: $functions_coalesce}
   - gt: {esql.functions.categorize: $functions_categorize}
   # Testing for the entire function set isn't feasible, so we just check that we return the correct count as an approximation.
-  - length: {esql.functions: 143} # check the "sister" test below for a likely update to the same esql.functions length check
+  - length: {esql.functions: 144} # check the "sister" test below for a likely update to the same esql.functions length check
 
 ---
 "Basic ESQL usage output (telemetry) non-snapshot version":