Allow OIDC to update EMAIL and username (if mapped)

[uwwint]

(Please replace this header with a description of your pull request. Please include BOTH what you did and why you made the changes. The "why" may simply be citing a relevant Galaxy issue.) (If fixing a bug, please add any relevant error or traceback) (For UI components, it is recommended to include screenshots or screencasts)

How to test the changes?

(Select all options that apply)

• [x] I've included appropriate automated tests.
• [ ] This is a refactoring of components with existing test coverage.
• [x] Instructions for manual testing are as follows:
  1. create an OIDC only galaxy
  2. register a user
  3. update the users email / username
  4. login into galaxy with that user: The username and email are updated.

License

• [x] I agree to license these and all my past contributions to the core galaxy codebase under the MIT license.

[uwwint]

@nuwang Can you help with this one?

[uwwint]

Agree @nuwang. Do you want me to rebase on #21356 or wait for the merge?

[nuwang]

The enable_account_interface flag is alrrady presenr so i dont think we need #21356 for this.