Accomodate membership id (#6221)

* fix: accomodate membership id

* fix: remove only

* fix: event handling

* fix: tests

* fix: use transaction

* Remove useless test

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Co-authored-by: Tom Moor <tom.moor@gmail.com>

server/presenters/collectionGroupMembership.ts

@@ -12,7 +12,7 @@ export default function presentCollectionGroupMembership(
   membership: GroupPermission
 ): Membership {
   return {
-    id: `${membership.groupId}-${membership.collectionId}`,
+    id: membership.id,
     groupId: membership.groupId,
     collectionId: membership.collectionId,
     permission: membership.permission,