Support Admin-only Swagger Docs

[sshah-asymmetrik]

We have some API endpoints that are only for Admin users. It would be nice to be able to hide the Swagger docs of those endpoints from non-Admin users. This came up along with some potential solutions in this discussion (#114 (comment)).

Acceptance Criteria

• Determine if filtering by tags, extending/customizing the Swagger UI, or some other option is a viable solution
• If so, make necessary updates enable hiding admin-only endpoints from non-admin users
• If not feasible/reasonable/possible, mention why and close issue.

[jrassa]

If possible, solution should support/account for other user roles as well. Here we also have the auditor role and downstream projects may add additional user roles.