feat: add new add/remove admin to organization, deprecate old add/remove

[shreddedbacon]

General Checklist

• [ ] Affected Issues have been mentioned in the Closing issues section
• [ ] Documentation has been written/updated
• [ ] PR title is ready for inclusion in changelog

Database Migrations

• [ ] If your PR contains a database migation, it MUST be the latest in date order alphabetically

The old process of adding a user as an owner of an organization was previously an owner flag, then with #3733 added admin. This is now different to other things that have a role concept.

This PR introduces a new OrganizationRole type and 2 new mutations that deprecate the older functions with the new types. Both old and new can still be used, but the recommendation would be to use the new ones for simplicity.

Changes

• addUserToOrganization -> addAdminToOrganization
  • The organization input is now an id or name input, either can be specified
  • The role input is an ENUM of VIEWER, ADMIN, OWNER
• removeUserFromOrganization -> removeAdmimFromOrganization
  • The organization input is now an id or name input, either can be specified
• The OrgUser type now has organizationRole which will return the users role
  • the admin and owner fields are deprecated, but still populated for backwards compatability