[9.0][DOCS] Renames ML get usage info APIs back to get stats (#4302)

* [DOCS] Renames ML get usage info APIs back to get stats. (#4299)

* Make contrib.

* Restores package-lock.json.

Author: szabosteve

output/openapi/elasticsearch-openapi.json

@@ -22,7 +22,7 @@ import { Id } from '@_types/common'
 import { integer } from '@_types/Numeric'
 
 /**
- * Get data frame analytics jobs usage info.
+ * Get data frame analytics job stats.
  * @rest_spec_name ml.get_data_frame_analytics_stats
  * @availability stack since=7.3.0 stability=stable
  * @availability serverless stability=stable visibility=public

output/openapi/elasticsearch-serverless-openapi.json

@@ -21,7 +21,7 @@ import { RequestBase } from '@_types/Base'
 import { Ids } from '@_types/common'
 
 /**
- * Get datafeeds usage info.
+ * Get datafeed stats.
  * You can get statistics for multiple datafeeds in a single API request by
  * using a comma-separated list of datafeeds or a wildcard expression. You can
  * get statistics for all datafeeds by using `_all`, by specifying `*` as the

output/schema/schema-serverless.json

@@ -21,7 +21,7 @@ import { RequestBase } from '@_types/Base'
 import { Id } from '@_types/common'
 
 /**
- * Get anomaly detection jobs usage info.
+ * Get anomaly detection job stats.
  * @rest_spec_name ml.get_job_stats
  * @availability stack since=5.5.0 stability=stable
  * @availability serverless stability=stable visibility=public