AO3-6759 Check admin roles for actions in TagWranglersController

[brianjaustin]

Pull Request Checklist

• Have you read "How to write the perfect pull request"?
• Have you read the contributing guidelines?
• Have you added tests for any changed functionality?
• Have you added the Jira issue number
  as the first thing in your pull request title (e.g. AO3-1234 Fix thing)
• Do you have fewer than 5 pull requests already open? If not, please wait
  until they are reviewed and merged before creating new pull requests.

Issue

https://otwarchive.atlassian.net/browse/AO3-6759

Purpose

Update the TagWranglersController to verify the current admin has the right roles to access each action

Credit

Brian Austin (they/he)

[Bilka2]

Code looks good, just a few notes regarding the tests.

[Bilka2]

Thank you!