[Backport] [1.x] Update to Netty 4.1.115.Final (#16661) (#16666)

[reta]

Backport pf #16661 to 1.x

[github-actions]

❌ Gradle check result for 334930e: 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 26d5b28: ABORTED

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 85631e4: ABORTED

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 036285d: SUCCESS

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (1.x@ad6dff4). Learn more about missing BASE report.
Report is 1 commits behind head on 1.x.

Additional details and impacted files

@@          Coverage Diff           @@
##             1.x   #16672   +/-   ##
======================================
  Coverage       ?   77.54%           
  Complexity     ?    58745           
======================================
  Files          ?     4223           
  Lines          ?   253572           
  Branches       ?    38700           
======================================
  Hits           ?   196637           
  Misses         ?    40911           
  Partials       ?    16024           

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[reta]

@andrross @peternied could you pleas help me here folks? thank you!

[reta]

@dblock mind this one as well please?

[opensearch-trigger-bot]

The backport to 1.3 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-1.3 1.3
# Navigate to the new working tree
pushd ../.worktrees/OpenSearch/backport-1.3
# Create a new branch
git switch --create backport/backport-16672-to-1.3
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 d4a76cd499a749005c8b6b4e733ac2a93b64bd7d
# Push it to GitHub
git push --set-upstream origin backport/backport-16672-to-1.3
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/OpenSearch/backport-1.3

Then, create a pull request where the base branch is 1.3 and the compare/head branch is backport/backport-16672-to-1.3.