[Backport 2.x] Add support to skip pinned timestamp in remote translog garbage collector

[opensearch-trigger-bot]

Backport ef47252 from #15416.

[github-actions]

❌ Gradle check result for 7b6881e: 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 7b6881e: SUCCESS

[codecov]

Codecov Report

Attention: Patch coverage is 86.77249% with 25 lines in your changes missing coverage. Please review.

Project coverage is 71.65%. Comparing base (5653ed6) to head (7b6881e).
Report is 3 commits behind head on 2.x.

Files with missing lines	Patch %	Lines
...rg/opensearch/index/translog/RemoteFsTranslog.java	85.50%	14 Missing and 6 partials ⚠️
...dex/translog/transfer/TranslogTransferManager.java	89.18%	2 Missing and 2 partials ⚠️
...ex/translog/transfer/TranslogTransferMetadata.java	90.90%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x   #15567      +/-   ##
============================================
+ Coverage     71.60%   71.65%   +0.04%     
- Complexity    63764    63830      +66     
============================================
  Files          5239     5239              
  Lines        298427   298579     +152     
  Branches      43440    43463      +23     
============================================
+ Hits         213694   213938     +244     
+ Misses        66952    66706     -246     
- Partials      17781    17935     +154     

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