Support cancellation for admin apis

[aasom143]

Description

Today, some APIs support only top-level timeouts, where a request is cancelled if it doesn't receive a response within the default 30-second timeout. However, the problem arises when these APIs internally make transport calls to cluster manager or other data nodes within the cluster even after the timeout expires. These internal/child calls, which are spawned by the API, are never timed out or cancelled, even though the top-level request was timed out. As a result, the cluster continues to perform unnecessary (wasteful) work and consuming resources but the user is not waiting for a response.

Related Issues

Resolves #13908

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• API changes companion pull request created.
• Failing checks are inspected and point to the corresponding known issue(s) (See: Troubleshooting Failing Builds)
• Commits are signed per the DCO using --signoff
• Commit changes are listed out in CHANGELOG.md file (See: Changelog)
• Public documentation issue/PR created

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[github-actions]

❌ Gradle check result for da592e1: FAILURE

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?

[gaobinlong]

Thanks for your work, but is there an issue related to your PR? It's better that each PR has a related PR to make sure everybody learn the idea and get more details about it, and please add some description about the code change in your PR to accelerate the reviewing process. In addition, please add a change log for this PR, and unit tests or yml tests for the code change are also needed.

[github-actions]

❌ Gradle check result for 9152bbf: FAILURE

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 result for 75cbb40: FAILURE

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 result for 6381e77: FAILURE

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 result for 24d16a2: FAILURE

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 result for 24d16a2: FAILURE

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 result for e062a97: UNSTABLE

• TEST FAILURES:

      1 org.opensearch.index.shard.RemoteIndexShardTests.testIgnoreShardIdle

Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.

[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:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/OpenSearch/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/OpenSearch/backport-2.x
# Create a new branch
git switch --create backport/backport-13966-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 9f814797d0fe57457359a1f8a1b222cea80dc003
# Push it to GitHub
git push --set-upstream origin backport/backport-13966-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/OpenSearch/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-13966-to-2.x.