Update Netty to 4.2.16.Final

[reta]

Description

Update Netty to 4.2.16.Final

Related Issues

N/A

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]

PR Reviewer Guide 🔍

(Review updated until commit c37ff7d)

Here are some key observations to aid the review process:

🧪 No relevant tests

🔒 No security concerns identified

✅ No TODO sections

🔀 No multiple PR themes

⚡ No major issues detected

[github-actions]

❌ Gradle check result for f6a9566: 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?

[reta]

❌ Gradle check result for f6a9566: 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?

The org.opensearch.http.netty4.Netty4HttpRequestSizeLimitIT.testDoesNotLimitExcludedRequests test case failure is legit, sent a pull request to netty (see please netty/netty#17068). I do have mitigation to apply but would like to close the loop first.

[github-actions]

Persistent review updated to latest commit c37ff7d

[github-actions]

❌ Gradle check result for c37ff7d: 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?