feat: Upgrade Jenkins version to 2.516.1

[totocaca123]

This change upgrades the Jenkins version to the latest stable LTS release, 2.516.1. The Jenkins baseline in the pom.xml has been updated to 2.516 and the corresponding BOM version has been updated to 5085.v05cc65a_936d3.

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