[Backport 2.x] Fixing flaky test testRemoteIndexPathFileExistsAfterMigration

[opensearch-trigger-bot]

Backport 1343367 from #15977.

[github-actions]

❌ Gradle check result for 79fbd3a: FAILURE

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 result for 79fbd3a: FAILURE

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?

[dbwiddis]

Flaky test tracked by:

• [AUTOCUT] Gradle Check Flaky Test Report for RemoteFsTimestampAwareTranslogTests #15818

[github-actions]

❕ Gradle check result for 79fbd3a: UNSTABLE

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

All modified and coverable lines are covered by tests ✅

Project coverage is 71.67%. Comparing base (fabe9c1) to head (79fbd3a).
Report is 4 commits behind head on 2.x.

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x   #16033      +/-   ##
============================================
- Coverage     71.69%   71.67%   -0.02%     
- Complexity    64624    64662      +38     
============================================
  Files          5276     5277       +1     
  Lines        302333   302465     +132     
  Branches      43989    43998       +9     
============================================
+ Hits         216756   216791      +35     
- Misses        67462    67564     +102     
+ Partials      18115    18110       -5     

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