Enable coordinator search.request_stats_enabled by default

[dzane17]

Description

Enable coordinator search.request_stats_enabled by default

Related Issues

Check List

• Functionality includes testing.
• API changes companion pull request created, if applicable.
• Public documentation issue/PR created, if applicable.

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 result for ffaed5a: 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 8a802a1: SUCCESS

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.93%. Comparing base (691f725) to head (8a802a1).
Report is 18 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #16290      +/-   ##
============================================
- Coverage     72.06%   71.93%   -0.13%     
+ Complexity    64822    64734      -88     
============================================
  Files          5308     5307       -1     
  Lines        302574   302540      -34     
  Branches      43710    43708       -2     
============================================
- Hits         218048   217643     -405     
- Misses        66648    66999     +351     
- Partials      17878    17898      +20     

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[dbwiddis]

@dzane17 does this need any documentation updates (see checklist in first comment)

[dzane17]

@dbwiddis I checked the nodes stats API documentation. We don't specify default values so no doc PR is needed. https://opensearch.org/docs/latest/api-reference/nodes-apis/nodes-stats/

[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-16290-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 88d13eb5bd3bbea3a04b7b0c7576ca00d0f8435c
# Push it to GitHub
git push --set-upstream origin backport/backport-16290-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-16290-to-2.x.

[dbwiddis]

@dzane17 can you please do a manual backport?