serializers/crate-owner-invite: Fix users side-loading

Previously, the `normalizeResponse()` implementation was throwing away the `users` array in the payload, because of a "missing id" issue (see #3490). The root cause for that however was not that the `id` field in the `user` objects was missing (it actually exists), but that the `modelNameFromPayloadKey()` implementation was unconditionally returning `'crate-owner-invite'` even for `user` payloads. This change fixes the `modelNameFromPayloadKey()` implementation to be compatible with `user` payloads and removes the now obsolete `normalizeResponse()` implementation.

Author: Turbo87

app/serializers/crate-owner-invite.js

@@ -3,19 +3,12 @@ import ApplicationSerializer from './application';
 export default class CrateOwnerInviteSerializer extends ApplicationSerializer {
   primaryKey = 'crate_id';
 
-  modelNameFromPayloadKey() {
+  modelNameFromPayloadKey(payloadKey) {
+    if (payloadKey === 'users') return 'user';
     return 'crate-owner-invite';
   }
 
   payloadKeyFromModelName() {
     return 'crate_owner_invite';
   }
-
-  normalizeResponse(store, schema, payload, id, requestType) {
-    if (payload.users) {
-      delete payload.users;
-    }
-
-    return super.normalizeResponse(store, schema, payload, id, requestType);
-  }
 }