Require Jenkins 2.479 or newer

[MarkEWaite]

Require Jenkins 2.479 or newer

Use Jakarta EE 9 and Spring Security 6.x instead of Java EE 8 and Spring Security 5.x.

Testing done

Confirmed that automated tests pass.

The job and node ownership plugin has an optional dependency on this plugin. That plugin also has 3 open security vulnerabilities, a tables to divs known issue, a 55% health score, was last released 4 years ago, and has less than 1700 installations. Plugin installation data indicates that less than 25% of the installations are running a Jenkins version released in the last 6 months.

Submitter checklist

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