Allow overwriting verification and approval status of a new user

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #1548
| Refs tickets  | ---
| License       | MIT
| Doc PR        | ---

This allows overwriting the verified and approval status even if the current user isn't admin. This is needed for @rgasch's use case and later on for oauth modules providing a verified email address (i.e. by Google).