Configure test-retry plugin filter properly

[andrross]

The intent of #8825 was to retry only specified tests. The wrong parameter was configured though: 'filter' should be set, not 'classRetry'.

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/21158/
• CommitID: c204c63
  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?

[Poojita-Raj]

Gradle Check (Jenkins) Run Completed with:

* **RESULT:** FAILURE ❌

* **URL:** https://build.ci.opensearch.org/job/gradle-check/21158/

* **CommitID:** [c204c63](https://github.com/opensearch-project/OpenSearch/commit/c204c63ca38a8668bb4ae601bff574f62a3ab084)
  Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green.
  Is the failure [a flaky test](https://github.com/opensearch-project/OpenSearch/blob/main/DEVELOPER_GUIDE.md#flaky-tests) unrelated to your change?

#8932

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: UNSTABLE ❕
• TEST FAILURES:

      1 org.opensearch.indices.replication.SegmentReplicationTargetServiceTests.testShardAlreadyReplicating

• URL: https://build.ci.opensearch.org/job/gradle-check/21175/
• CommitID: c204c63
  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 #8933 (c204c63) into main (91bc891) will increase coverage by 0.03%.
Report is 2 commits behind head on main.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main    #8933      +/-   ##
============================================
+ Coverage     71.05%   71.09%   +0.03%     
- Complexity    57198    57226      +28     
============================================
  Files          4758     4758              
  Lines        269863   269863              
  Branches      39484    39484              
============================================
+ Hits         191755   191848      +93     
+ Misses        61982    61842     -140     
- Partials      16126    16173      +47     

see 460 files with indirect coverage changes