Invoke 'project_rename' system hook upon renaming a project

What does this MR do?

Invokes system hook for project_rename event as detailed in the system hooks documentation:

• https://docs.gitlab.com/ce/system_hooks/system_hooks.html

Are there points in the code the reviewer needs to double check?

Should two hooks be invoked when a project is only renamed?

• With the old implementation project_update is invoked upon project rename
• With the new implementation project_update and project_rename hooks are invoked upon project rename

Why was this MR needed?

Documentation was incorrect

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• API support added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Closes #30834 (moved)