Merge branch 'feature/instrument-es-code' into 'master'

Instrument more ES-related code

See merge request !721

CHANGELOG-EE

 Please view this file on the master branch, on stable branches it's out of date.
 v 8.12.0 (Unreleased)
+  - [ES] Instrument Elasticsearch::Git::Repository
+  - [ES] Instrument other Gitlab::Elastic classes
 
 v 8.11.6
   - Exclude blocked users from potential MR approvers

config/initializers/metrics.rb

@@ -149,10 +149,18 @@ if Gitlab::Metrics.enabled?
     config.instrument_methods(Gitlab::Highlight)
     config.instrument_instance_methods(Gitlab::Highlight)
 
+    config.instrument_methods(Elasticsearch::Git::Repository)
+    config.instrument_instance_methods(Elasticsearch::Git::Repository)
+
     config.instrument_instance_methods(Search::GlobalService)
     config.instrument_instance_methods(Search::ProjectService)
+
     config.instrument_instance_methods(Gitlab::Elastic::SearchResults)
     config.instrument_instance_methods(Gitlab::Elastic::ProjectSearchResults)
+    config.instrument_instance_methods(Gitlab::Elastic::Indexer)
+    config.instrument_instance_methods(Gitlab::Elastic::SnippetSearchResults)
+    config.instrument_methods(Gitlab::Elastic::Helper)
+
     config.instrument_instance_methods(Elastic::ApplicationSearch)
     config.instrument_instance_methods(Elastic::IssuesSearch)
     config.instrument_instance_methods(Elastic::MergeRequestsSearch)