test inline javascript checks with pct

[mawinter69]

Test inline javascript checks with weekly Jenkins

jenkinsci/jenkins-test-harness#868
jenkinsci/maven-hpi-plugin#814

Testing done

Submitter checklist

• Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• Ensure that the pull request title represents the desired changelog entry
• Please describe what you did
• Link to relevant issues in GitHub or Jira
• Link to relevant pull requests, esp. upstream and downstream changes
• Ensure you have provided tests that demonstrate the feature works or the issue is fixed

[timja]

Will need a PR including jenkinsci/maven-hpi-plugin#464 I expect.

See #5898