MM-61484 - Deleting scheduled posts when permanently deleting a user (#29152)

* Deleting scheduled posts when permanently deleting a user

* Updated tests

* CI

* Testing CI

* Restored a test change

* Skipping flaky test

server/i18n/en.json

@@ -6549,6 +6549,10 @@
       "other": "Failed to send {{.Count}} scheduled posts."
     }
   },
+  {
+    "id": "app.scheduled_post.permanent_delete_by_user.app_error",
+    "translation": "Unable to delete scheduled posts for user."
+  },
   {
     "id": "app.scheme.delete.app_error",
     "translation": "Unable to delete this scheme."