Prevent deletion of snapshot backing index

[Vishalks]

Description

The changes prevent deletion of remote searchable snapshots that are backing any indices

Issues Resolved

#4967

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/7293/
• CommitID: 29dc647
  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?

[andrross]

FYI @Vishalks

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':server:forbiddenPatterns'.
> Found invalid patterns:
  - tab on line 2221 of server/src/main/java/org/opensearch/snapshots/SnapshotsService.java

[Vishalks]

FYI @Vishalks

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':server:forbiddenPatterns'.
> Found invalid patterns:
  - tab on line 2221 of server/src/main/java/org/opensearch/snapshots/SnapshotsService.java

Yes, I am aware of it. Facing a weird issue where it doesn't show the tabs (mentioned in the error) on VIM and I am not able to open the code on backport branch in my IDE. Still working on it.

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/7298/
• CommitID: 29dc647
  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.indices.stats.IndexStatsIT.testFilterCacheStats

• URL: https://build.ci.opensearch.org/job/gradle-check/7300/
• CommitID: eb8d34f
  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-commenter]

Codecov Report

Merging #5365 (eb8d34f) into 2.x (d74d992) will decrease coverage by 0.03%.
The diff coverage is 87.50%.

@@             Coverage Diff              @@
##                2.x    #5365      +/-   ##
============================================
- Coverage     70.67%   70.63%   -0.04%     
- Complexity    58308    58344      +36     
============================================
  Files          4700     4701       +1     
  Lines        279111   279131      +20     
  Branches      40749    40753       +4     
============================================
- Hits         197254   197170      -84     
- Misses        65377    65551     +174     
+ Partials      16480    16410      -70     

Impacted Files	Coverage Δ
...arch/snapshots/SnapshotInUseDeletionException.java	40.00% <40.00%> (ø)
...g/opensearch/ingest/common/URLDecodeProcessor.java	87.50% <100.00%> (+17.50%)	⬆️
.../main/java/org/opensearch/OpenSearchException.java	92.05% <100.00%> (+0.01%)	⬆️
server/src/main/java/org/opensearch/Version.java	83.63% <100.00%> (ø)
...n/java/org/opensearch/snapshots/SnapshotUtils.java	87.30% <100.00%> (+3.96%)	⬆️
...ava/org/opensearch/snapshots/SnapshotsService.java	45.34% <100.00%> (+5.57%)	⬆️
...adonly/AddIndexBlockClusterStateUpdateRequest.java	0.00% <0.00%> (-75.00%)	⬇️
...readonly/TransportVerifyShardIndexBlockAction.java	9.75% <0.00%> (-58.54%)	⬇️
...n/admin/indices/readonly/AddIndexBlockRequest.java	17.85% <0.00%> (-53.58%)	⬇️
...indices/readonly/TransportAddIndexBlockAction.java	20.68% <0.00%> (-41.38%)	⬇️
... and 478 more

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