[AC-2027] Update Flexible Collections logic to use organization property (#3644)

* Update optionality to use org.FlexibleCollections

Also break old feature flag key to ensure it's never enabled

* Add logic to set defaults for collection management setting

* Update optionality logic to use org property

* Add comments

* Add helper method for getting individual orgAbility

* Fix validate user update permissions interface

* Fix tests

* dotnet format

* Fix more tests

* Simplify self-hosted update logic

* Fix mapping

* Use new getOrganizationAbility method

* Refactor invite and save orgUser methods

Pass in whole organization object instead of using OrganizationAbility

* fix CipherService tests

* dotnet format

* Remove manager check to simplify this set of changes

* Misc cleanup before review

* Fix undefined variable

* Refactor bulk-access endpoint to avoid early repo call

* Restore manager check

* Add tests for UpdateOrganizationLicenseCommand

* Add nullable regions

* Delete unused dependency

* dotnet format

* Fix test

src/Core/Vault/Services/Implementations/CipherService.cs

@@ -788,7 +788,7 @@ public class CipherService : ICipherService
             {
                 collection.SetNewId();
                 newCollections.Add(collection);
-                if (UseFlexibleCollections)
+                if (org.FlexibleCollections)
                 {
                     newCollectionUsers.Add(new CollectionUser
                     {