Add Git Forensics to the managed set

[darinpope]

Add Git Forensics to the managed set

Testing done

• LINE=weekly PLUGINS=git-forensics bash local-test.sh
• LINE=2.479.x PLUGINS=git-forensics bash local-test.sh
• LINE=2.462.x PLUGINS=git-forensics bash local-test.sh
• LINE=2.452.x PLUGINS=git-forensics bash local-test.sh

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