Add integ tests for remote store stats api

[linuxpi]

Description

Adds integ tests for Remote Store Stats API

Related Issues

NA

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Commits are signed per the DCO using --signoff
• Commit changes are listed out in CHANGELOG.md file (See: Changelog)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/17874/
• CommitID: 09f5bd0
  Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green.
  Is the failure a flaky test unrelated to your change?

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/17875/
• CommitID: b6abfc2
  Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green.
  Is the failure a flaky test unrelated to your change?

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/17876/
• CommitID: cd479c8
  Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green.
  Is the failure a flaky test unrelated to your change?

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/17887/
• CommitID: feaedcf
  Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green.
  Is the failure a flaky test unrelated to your change?

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: UNSTABLE ❕
• TEST FAILURES:

      1 org.opensearch.search.backpressure.SearchBackpressureIT.testSearchTaskCancellationWithHighCpu
      1 org.opensearch.remotestore.SegmentReplicationUsingRemoteStoreIT.testUpdateOperations
      1 org.opensearch.http.SearchRestCancellationIT.testAutomaticCancellationMultiSearchDuringQueryPhase

• URL: https://build.ci.opensearch.org/job/gradle-check/17937/
• CommitID: 5e43d82
  Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.

[codecov]

Codecov Report

Merging #8135 (5e43d82) into main (1d2c57d) will increase coverage by 0.04%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main    #8135      +/-   ##
============================================
+ Coverage     70.82%   70.86%   +0.04%     
+ Complexity    56596    56593       -3     
============================================
  Files          4722     4722              
  Lines        267608   267608              
  Branches      39216    39216              
============================================
+ Hits         189522   189633     +111     
+ Misses        62114    61947     -167     
- Partials      15972    16028      +56     

see 450 files with indirect coverage changes

[dblock]

Looks like backport failed and will need some work @linuxpi.

[psychbot]

@dblock I will work on creating the backport PR for this.