[Remote Store] Add missing unit test in main

[dreamer-89]

Description

Forward port unit test testUploadMetadataMissingSegment added in #8653

Related Issues

Resolves None

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/21822/
• CommitID: 2c6f160
  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?

[dreamer-89]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/21822/
• CommitID: 2c6f160
  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.action.admin.cluster.node.tasks.ResourceAwareTasksTests.testTaskResourceTrackingDuringTaskCancellation

• URL: https://build.ci.opensearch.org/job/gradle-check/21830/
• CommitID: 2c6f160
  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

Merging #9101 (2c6f160) into main (e55dade) will decrease coverage by 0.03%.
Report is 4 commits behind head on main.
The diff coverage is 69.23%.

@@             Coverage Diff              @@
##               main    #9101      +/-   ##
============================================
- Coverage     71.03%   71.00%   -0.03%     
+ Complexity    57314    57275      -39     
============================================
  Files          4765     4765              
  Lines        270357   270380      +23     
  Branches      39543    39546       +3     
============================================
- Hits         192043   191993      -50     
- Misses        62151    62249      +98     
+ Partials      16163    16138      -25     

Files Changed	Coverage Δ
...search/index/shard/RemoteStoreRefreshListener.java	82.51% <0.00%> (-6.44%)	⬇️
...ckpoint/SegmentReplicationCheckpointPublisher.java	100.00% <ø> (ø)
...s/replication/SegmentReplicationTargetService.java	60.00% <57.69%> (+0.74%)	⬆️
.../opensearch/index/engine/NRTReplicationEngine.java	78.98% <66.66%> (-0.49%)	⬇️
.../indices/replication/SegmentReplicationTarget.java	89.71% <85.71%> (+0.39%)	⬆️
...in/java/org/opensearch/index/shard/IndexShard.java	69.33% <86.95%> (-0.41%)	⬇️

... and 488 files with indirect coverage changes

[dreamer-89]

Codecov is reporting missing coverage for unrelated changes. Ignoring.
Check compatibility is currently flaky. Anyway, with this PR we are only adding a unit test, so ignoring this check. I retried it once already CC @gaiksaya

[gaiksaya]

Codecov is reporting missing coverage for unrelated changes. Ignoring. Check compatibility is currently flaky. Anyway, with this PR we are only adding a unit test, so ignoring this check. I retried it once already CC @gaiksaya

Yes they are false negatives since plugins' branches are not in sync with core yet! See attached open issues in this PR: #9073