Add support for ungraceful shutdown of nodes in integ tests

[BhumikaSaini-Amazon]

Description

Adds the support for ungraceful shutdown of nodes in integ tests. This iteration of the change covers only node restart use cases. Updating existing tests to consume this functionality will be tracked as a separate effort.

Related Issues

Resolves #[Issue number to be closed when this PR is merged]

Check List

• [ ] New functionality includes testing.
  • [ ] All tests pass
• [ ] New functionality has been documented.
  • [ ] New functionality has javadoc added
• [ ] Failing checks are inspected and point to the corresponding known issue(s) (See: Troubleshooting Failing Builds)
• [ ] Commits are signed per the DCO using --signoff
• [ ] Commit changes are listed out in CHANGELOG.md file (See: Changelog)
• [ ] Public documentation issue/PR created

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[github-actions[bot]]

:x: Gradle check result for 2d3ac1956c1e348b332e1834a74c70cba9ff8347: 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?

[BhumikaSaini-Amazon]

Terminating threads launched for a node outside of the node's threadpool isn't working currently. Looking for a way to handle these threads.

[opensearch-trigger-bot[bot]]

This PR is stalled because it has been open for 30 days with no activity.