NUTCH-3204 Trigger single-node Hadoop smoke test from PR /smoke-test comments and release tags

[lewismc]

PR for NUTCH-3204

• I added the GitHub Actions workflow to queue the ASF Jenkins single-node Hadoop smoke job from /smoke-test (will only execute for GitHub users with write access to the Nutch repository) and release-X.Y[.Z] tag pushes
• Updated the smoke Jenkinsfile to post/update a single PR status comment (initially a ACK which will then be updated by Jenkins with the final result)
• Skip the Actions job unless the comment body contains /smoke-test (or the event is a tag push)

Committer-facing documentation exists on the project wiki

[sonarqubecloud]

Quality Gate failed

Failed conditions
D Security Rating on New Code (required ≥ A)
E Reliability Rating on New Code (required ≥ A)

See analysis details on SonarQube Cloud

Catch issues before they fail your Quality Gate with our IDE extension SonarQube for IDE

[lewismc]

Looks like SonarCloud scanner is flagging issues with "new code" not contained in the pull request scope. I'm not sure entirely why.
Additionally, this is another feature that can only be validated once merged into master.

[sebastian-nagel]

Looks good to me.

can only be validated once merged

Yes. That might result in a forth and back until smoke tests are run and also succeed.