[JENKINS-74110][JENKINS-74109] Extract inline JavaScript

[yaroslavafenkin]

https://issues.jenkins.io/browse/JENKINS-74110
https://issues.jenkins.io/browse/JENKINS-74109

Testing done

JENKINS-74110
Before the change
After the change

JENKINS-74109
Before the change
After the change

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

[Greybird]

Thanks a lot!