Fix stale cluster state custom file deletion

[soosinha]

Description

When remote cluster state publication is enabled, cluster state custom objects get uploaded to remote store. The stale file deletion logic deletes stale remote state files. But the cluster state custom files are not getting deleted.
This PR fixes the logic for stale cluster state custom file deletion.

Related Issues

NA

Check List

• Functionality includes testing.
• API changes companion pull request created, if applicable.
• Public documentation issue/PR created, if applicable.

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[github-actions]

❌ Gradle check result for 15cc0a9: 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?

[shwetathareja]

@soosinha lets add the changelog for the bug fix.

[github-actions]

❌ Gradle check result for 15cc0a9: 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?

[soosinha]

@shwetathareja Added changelog

[github-actions]

❕ Gradle check result for 2e1bf62: 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 72.09%. Comparing base (3b4fa0e) to head (2e1bf62).
Report is 5 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #16670      +/-   ##
============================================
- Coverage     72.11%   72.09%   -0.03%     
- Complexity    65192    65214      +22     
============================================
  Files          5318     5318              
  Lines        303903   303908       +5     
  Branches      43970    43974       +4     
============================================
- Hits         219166   219094      -72     
- Misses        66786    66888     +102     
+ Partials      17951    17926      -25     

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[shwetathareja]

@soosinha Please raise a new PR for adding /update integ test ensuring delete works for every cluster state entity.