* Remove Organization.FlexibleCollections from code
* Drop Organization.FlexibleCollections column in EF databases
(MSSQL column to be retained for 1 additional deployment to support rollback in cloud)
* 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