[Segment Replication] Remove Restriction of strictly using only docrep for system indices and hidden indices

[Rishikesh1159]

Description

This PR removes the restriction of strictly using only docrep for system indices and hidden indices

Related Issues

Part of issue #8182

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: UNSTABLE ❕
• TEST FAILURES:

      1 org.opensearch.search.pit.DeletePitMultiNodeIT.testDeleteWhileSearch
      1 org.opensearch.search.backpressure.SearchBackpressureIT.testSearchShardTaskCancellationWithHighCpu
      1 org.opensearch.remotestore.CreateRemoteIndexTranslogDisabledIT.testRemoteStoreTranslogDisabledByUser

• URL: https://build.ci.opensearch.org/job/gradle-check/18115/
• CommitID: aa9b732
  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 #8200 (7bd8c64) into main (9e4e54d) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main    #8200      +/-   ##
============================================
+ Coverage     70.91%   70.93%   +0.02%     
- Complexity    56925    56965      +40     
============================================
  Files          4759     4759              
  Lines        269189   269181       -8     
  Branches      39399    39397       -2     
============================================
+ Hits         190896   190954      +58     
+ Misses        62205    62094     -111     
- Partials      16088    16133      +45     

Impacted Files	Coverage Δ
...h/cluster/metadata/MetadataCreateIndexService.java	79.82% <100.00%> (+0.06%)	⬆️

... and 476 files with indirect coverage changes

[ankitkala]

We need to run integration tests for different plugins/modules using system indices to ensure no regression with Segrep.
To start with, can we run integration tests for security plugin(.opendistro_security) and task framework(.tasks) to ensure that there are no additional changes required for the system indices which are in critical path.
We can do it as a follow up.

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/19167/
• CommitID: c82f6e6
  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/19179/
• CommitID: 900271f
  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.repositories.azure.AzureBlobContainerRetriesTests.testReadRangeBlobWithRetries
      1 org.opensearch.remotestore.SegmentReplicationUsingRemoteStoreIT.testNodeDropWithOngoingReplication

• URL: https://build.ci.opensearch.org/job/gradle-check/19183/
• CommitID: 7bd8c64
  Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.

[mch2]

LGTM, thanks for this change @Rishikesh1159 we can test plugin compatibility with SR for 2.9.

[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/backport-2.x
# Create a new branch
git switch --create backport/backport-8200-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 bea26f97c66070581070764fe4790d2f0579c8e7
# Push it to GitHub
git push --set-upstream origin backport/backport-8200-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-8200-to-2.x.