Add a name field to the group edit form

What does this MR do?

Adds a text field to the group create and edit forms that enables edit of the group name. Formerly the value of the name for the new or existing group was copied from the value of the path.

I'm mentioning @awhildy and @hazelyang from the issue thread to bring it to your attention.

Thanks to @smcgivern and @ClemMakesApps for mentoring help.

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

Ensure test coverage is sufficient and conforms to expectations.

Why was this MR needed?

This satisfies a feature request in the backlog for community contribution to the community edition.

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated
• API support added
• Tests
  • [x ] 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?

25474