[CE] Resolve "Extract EE specific files/lines for app/views/admin/groups"

EE MR: gitlab-ee!5921

What does this MR do?

This extracts EE specific files/lines for app/views/admin/groups.

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

Does this MR meet the acceptance criteria?

• Conform by the code review guidelines
  • Has been reviewed by a Backend maintainer
• Conform by the merge request performance guides
• Conform by the style guides
• If you have multiple commits, please combine them into a few logically organized commits by squashing them
• Internationalization required/considered
• End-to-end tests pass (package-and-qa manual pipeline job)

What are the relevant issue numbers?

Closes gitlab-ee#6216