[Backport 2.1] Upgrade netty from 4.1.73.Final to 4.1.78.Final

[opensearch-trigger-bot]

Backport 5c531bb from #3772

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/420/
• CommitID: 340a56d

[reta]

Gradle Check (Jenkins) Run Completed with:

* **RESULT:** FAILURE ❌

* **URL:** https://build.ci.opensearch.org/job/gradle-check/420/

* **CommitID:** [340a56d](https://github.com/opensearch-project/OpenSearch/commit/340a56d25e3eddcd3e96a63a010f85908be4fbad)

Fix is opensearch-project/opensearch-build#2328

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/422/
• CommitID: 340a56d

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: SUCCESS ✅
• URL: https://build.ci.opensearch.org/job/gradle-check/428/
• CommitID: 340a56d