Remove concurrency based minimum file cache size restriction

[kotwanikunal]

Description

• Removes concurrency based minimum file cache size restriction which limits based on per segment capacity.
• Details on Remove minimum file cache size restriction #8259

Related Issues

Resolves #8259

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)

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[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/18490/
• CommitID: 25d71e7
  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 (Jenkins) Run Completed with:

• RESULT: UNSTABLE ❕
• TEST FAILURES:

      2 org.opensearch.remotestore.SegmentReplicationRemoteStoreIT.classMethod
      1 org.opensearch.remotestore.SegmentReplicationUsingRemoteStoreIT.testNodeDropWithOngoingReplication
      1 org.opensearch.remotestore.SegmentReplicationRemoteStoreIT.testPressureServiceStats

• URL: https://build.ci.opensearch.org/job/gradle-check/18492/
• CommitID: 71b4b07
  Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.