Add @sachinpkale as an OpenSearch maintainer

[andrross]

I have nominated and maintainers have agreed to invite Sachin Kale (@sachinpkale) to be a co-maintainer. Sachin has kindly accepted.

Sachin has led the design and implementation of the remote backed storage feature in OpenSearch. This feature was introduced as experimental in OpenSearch 2.3 and is planned for general availability in 2.9. Some significant issues and PRs authored by Sachin for this effort are as follows:

Feature proposal: #1968
Upload segments to remote store post refresh: #3460
Add rest endpoint for remote store restore: #3576
Add RemoteSegmentStoreDirectory to interact with remote segment store: #4020

In total, Sachin has authored 57 PRs going back to May 2022. He also frequently reviews contributions from others and has reviewed nearly 100 PRs in the same time frame.

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.backpressure.SearchBackpressureIT.testSearchShardTaskCancellationWithHighCpu
      1 org.opensearch.remotestore.RemoteStoreRefreshListenerIT.testRemoteRefreshRetryOnFailure

• URL: https://build.ci.opensearch.org/job/gradle-check/17334/
• CommitID: 3a43576
  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 #8019 (9143090) into main (5c32256) will decrease coverage by 0.04%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main    #8019      +/-   ##
============================================
- Coverage     70.88%   70.85%   -0.04%     
- Complexity    56561    56572      +11     
============================================
  Files          4719     4719              
  Lines        267446   267446              
  Branches      39210    39210              
============================================
- Hits         189582   189498      -84     
- Misses        61873    61926      +53     
- Partials      15991    16022      +31     

see 462 files with indirect coverage changes

[reta]

CODEOWNERS will be changed separately?

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/17342/
• CommitID: 84678a7
  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]

CODEOWNERS will be changed separately?

I missed that! Updated the PR.

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: UNSTABLE ❕
• TEST FAILURES:

      1 org.opensearch.search.backpressure.SearchBackpressureIT.testSearchTaskCancellationWithHighCpu
      1 org.opensearch.remotestore.SegmentReplicationUsingRemoteStoreIT.testCancelPrimaryAllocation

• URL: https://build.ci.opensearch.org/job/gradle-check/17343/
• CommitID: 9143090
  Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.

[gaiksaya]

Permissions are updated now:

[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-8019-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 c45073c2e8c8eb850f707fae2adf3ca37c08c896
# Push it to GitHub
git push --set-upstream origin backport/backport-8019-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-8019-to-2.x.