[JENKINS-74056] Extract JS in PipelineHeaderExtension/columnHeader.jelly

[shlomomdahan]

JENKINS-74056

Similar Extraction - used as reference

To test:

1. Create a pipeline similar to [JENKINS-73960] Extract event handlers in BuildCardExtension/buildCardTemplate.jelly #142
2. In the pipeline configuration settings, use the below setting to reveal the column Header cards.
   

You should see the cards above the pipeline:

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 demonstrates feature works or fixes the issue

[basil]

Can we split the negative ID bugfix into a separate PR so that I can review that independently of the CSP changes?

[shlomomdahan]

@basil

PR for negative ID bugfix created: #157