[Backport] [2.x] Bump Netty to 4.1.114.Final (#16182)

[reta]

Backport of #16182 of 2.x

[github-actions]

❕ Gradle check result for b4ffa84: UNSTABLE

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

All modified and coverable lines are covered by tests ✅

Project coverage is 71.73%. Comparing base (a12e3e6) to head (b4ffa84).
Report is 45 commits behind head on 2.x.

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x   #16184      +/-   ##
============================================
- Coverage     71.75%   71.73%   -0.02%     
- Complexity    64708    64815     +107     
============================================
  Files          5278     5279       +1     
  Lines        302570   302964     +394     
  Branches      44013    44072      +59     
============================================
+ Hits         217098   217328     +230     
- Misses        67315    67508     +193     
+ Partials      18157    18128      -29     

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[reta]

@peternied mind approving this one as well? thank you

[opensearch-trigger-bot]

The backport to 1.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-1.x 1.x
# Navigate to the new working tree
pushd ../.worktrees/backport-1.x
# Create a new branch
git switch --create backport/backport-16184-to-1.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 f44ce4cbd119b2672a1385aa89dab7dc7dd6f9bc
# Push it to GitHub
git push --set-upstream origin backport/backport-16184-to-1.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/backport-1.x

Then, create a pull request where the base branch is 1.x and the compare/head branch is backport/backport-16184-to-1.x.

[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:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/backport-1.3 1.3
# Navigate to the new working tree
pushd ../.worktrees/backport-1.3
# Create a new branch
git switch --create backport/backport-16184-to-1.3
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 f44ce4cbd119b2672a1385aa89dab7dc7dd6f9bc
# Push it to GitHub
git push --set-upstream origin backport/backport-16184-to-1.3
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/backport-1.3

Then, create a pull request where the base branch is 1.3 and the compare/head branch is backport/backport-16184-to-1.3.