SegRep with Remote: Add hook for publishing checkpoint notifications after segment upload to remote store

[ankitkala]

Description

This change adds a hook to publish the notification to replicas when a segments are uploaded to the remote store.
This change also gates this behind a new feature flag for Segment Replication with remote store..

Related Issues

#5578

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)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/14804/
• CommitID: 0c8f98b
  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: SUCCESS ✅
• URL: https://build.ci.opensearch.org/job/gradle-check/15236/
• CommitID: 1067906

[codecov-commenter]

Codecov Report

Merging #7394 (e381c2c) into main (e44b3f1) will increase coverage by 0.09%.
The diff coverage is 71.42%.

@@             Coverage Diff              @@
##               main    #7394      +/-   ##
============================================
+ Coverage     70.47%   70.57%   +0.09%     
+ Complexity    59728    59726       -2     
============================================
  Files          4896     4896              
  Lines        286798   286807       +9     
  Branches      41331    41335       +4     
============================================
+ Hits         202133   202417     +284     
+ Misses        68078    67724     -354     
- Partials      16587    16666      +79     

Impacted Files	Coverage Δ
.../main/java/org/opensearch/index/IndexSettings.java	84.19% <0.00%> (-0.44%)	⬇️
...in/java/org/opensearch/index/shard/IndexShard.java	70.64% <66.66%> (+0.58%)	⬆️
...nsearch/index/shard/CheckpointRefreshListener.java	91.66% <75.00%> (-8.34%)	⬇️
...search/index/shard/RemoteStoreRefreshListener.java	81.56% <100.00%> (-0.33%)	⬇️

... and 465 files with indirect coverage changes

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/15239/
• CommitID: 511b605
  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: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/15302/
• CommitID: 61465ba
  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: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/15385/
• CommitID: cfc7f4c
  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: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/15388/
• CommitID: e2b1a3b
  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: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/15393/
• CommitID: 21e6838
  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: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/15396/
• CommitID: 4406a7f
  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:

      1 org.opensearch.remotestore.RemoteStoreRefreshListenerIT.testRemoteRefreshRetryOnFailure

• URL: https://build.ci.opensearch.org/job/gradle-check/15440/
• CommitID: e487a38
  Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: SUCCESS ✅
• URL: https://build.ci.opensearch.org/job/gradle-check/15450/
• CommitID: e381c2c