* Enforce free organization limit when updating user
* Add test for throwing error on accepting admin user joining multiple free organizations
* Add test for throwing BadRequest when free organization admin attempts to sign up for another free organization
* Fix user ID handling in UpdateOrganizationUserCommand for free organizations
* Rename parameter 'user' to 'organizationUser' in UpdateUserAsync method for clarity
* Add HasConfirmedOwnersExceptQuery class, interface and unit tests
* Register IHasConfirmedOwnersExceptQuery for dependency injection
* Replace OrganizationService.HasConfirmedOwnersExceptAsync with HasConfirmedOwnersExceptQuery
* Refactor DeleteManagedOrganizationUserAccountCommand to use IHasConfirmedOwnersExceptQuery
* Fix unit tests
* Extract IOrganizationService.RemoveUserAsync into IRemoveOrganizationUserCommand; Update unit tests
* Extract IOrganizationService.RemoveUsersAsync into IRemoveOrganizationUserCommand; Update unit tests
* Refactor RemoveUserAsync(Guid organizationId, Guid userId) to use ValidateDeleteUser
* Refactor RemoveOrganizationUserCommandTests to use more descriptive method names
* Refactor controller actions to accept Guid directly instead of parsing strings
* Add unit tests for removing OrganizationUser by UserId
* Refactor remove OrganizationUser by UserId method
* Add summary to IHasConfirmedOwnersExceptQuery
* chore: remove fc refs in CreateGroup and UpdateGroup commands, refs AC-2646
* chore: remove fc refs and update interface to represent usage/get rid of double enumeration warnings, refs AC-2646
* chore: remove org/provider service fc callers, refs AC-2646
* chore: remove collection service fc callers, refs AC-2646
* chore: remove cipher service import ciphers fc callers, refs AC-2646
* fix: UpdateOrganizationUserCommandTests collections to list, refs AC-2646
* fix: update CreateGroupCommandTests, refs AC-2646
* fix: adjust UpdateGroupCommandTests, refs AC-2646
* fix: adjust UpdateOrganizationUserCommandTests for FC always true, refs AC-2646
* fix: update CollectionServiceTests, refs AC-2646
* fix: remove unnecessary test with fc disabled, refs AC-2646
* fix: update tests to account for AccessAll removal and Manager removal, refs AC-2646
* chore: remove dependence on FC flag for tests, refs AC-2646
* [PM-3176] Extract IOrganizationService.SaveUserAsync to a command
* [PM-3176] Enabled nullable on command
* [PM-3176] Removed check that was not working