[Backport 2.x] Apply OpenSearchIntegTestCase::featureFlagSettings by default (#5940)

[andrross]

Backport 7a511dd from #5940

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/9626/
• CommitID: e0078bc
  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 (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/9627/
• CommitID: 8f4bce5
  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?

[andrross]

I'm going to wait for #5945 to be merged and then rebase this backport.

[dreamer-89]

I see last couple of gradle check failures.

1: Task failed with an exception.
-----------
* What went wrong:
Execution failed for task ':test:framework:compileJava'.
> Compilation failed; see the compiler error output for details.

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
==============================================================================

Looks like a legit failure. @andrross

> Task :test:framework:compileJava
/var/jenkins/workspace/gradle-check/search/test/framework/src/main/java/org/opensearch/test/OpenSearchIntegTestCase.java:1908: error: cannot find symbol
            .put(featureFlagSettings());
                 ^
  symbol:   method featureFlagSettings()
  location: class OpenSearchIntegTestCase

2: Task failed with an exception.

• What went wrong:
  Execution failed for task ':distribution:bwc:bugfix:buildBwcLinuxTar'.

Building 2.4.1 didn't generate expected file /var/jenkins/workspace/gradle-check/search/distribution/bwc/bugfix/build/bwc/checkout-2.4/distribution/archives/linux-tar/build/distributions/opensearch-min-2.4.1-SNAPSHOT-linux-x64.tar.gz

• Try:

Run with --stacktrace option to get the stack trace.
Run with --info or --debug option to get more log output.
==============================================================================

3: Task failed with an exception.

• What went wrong:
  Execution failed for task ':distribution:bwc:maintenance:buildBwcLinuxTar'.

Building 1.3.7 didn't generate expected file /var/jenkins/workspace/gradle-check/search/distribution/bwc/maintenance/build/bwc/checkout-1.3/distribution/archives/linux-tar/build/distributions/opensearch-min-1.3.7-SNAPSHOT-linux-x64.tar.gz

This is failing because of version bump in 1.x from 1.3.7 -> 1.3.8. Would need same here. Raising PR for this.
Looks like https://github.com/andrross/OpenSearch/commits/backport/backport-5940-to-2.x is pretty old and needs rebase.

[dreamer-89]

LGTM! Thanks @andrross for this change.

This is currently failing gradle check that should be fixed post rebase.

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/9649/
• CommitID: d4f458c
  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 (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/9652/
• CommitID: b21b410
  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 (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/9650/
• CommitID: 6283fb3
  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 (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/9653/
• CommitID: 75c9134
  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 (Jenkins) Run Completed with:

• RESULT: SUCCESS ✅
• URL: https://build.ci.opensearch.org/job/gradle-check/9654/
• CommitID: bf0bcc6