[EC-416] Refactor organization permission checks (#3252)

* Replace Permissions enum and helper methods with callbacks

* Remove scim feature flag

* Check if org has feature enabled as part of canManage checks

* Pin jest-mock-extended at v2.0.6 to fix compilation error

apps/web/config/development.json

@@ -10,7 +10,6 @@
     "proxyNotifications": "http://localhost:61840"
   },
   "flags": {
-    "showTrial": true,
-    "scim": true
+    "showTrial": true
   }
 }