[Backport 2.x] Change RemoteSegmentStoreDirectory init at given timestamp to ignore pinned timestamp setting

[opensearch-trigger-bot]

Backport 30ed15d from #15457.

[github-actions]

❕ Gradle check result for f6b467a: UNSTABLE

• TEST FAILURES:

      1 org.opensearch.index.reindex.DeleteByQueryBasicTests.testDeleteByQueryWithMultipleIndices

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

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 71.75%. Comparing base (36a5ac5) to head (f6b467a).
Report is 1 commits behind head on 2.x.

Files with missing lines	Patch %	Lines
server/src/main/java/org/opensearch/node/Node.java	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x   #15553      +/-   ##
============================================
- Coverage     71.77%   71.75%   -0.02%     
- Complexity    63851    63852       +1     
============================================
  Files          5238     5238              
  Lines        298412   298413       +1     
  Branches      43440    43440              
============================================
- Hits         214174   214122      -52     
- Misses        66339    66409      +70     
+ Partials      17899    17882      -17     

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