Merge branch '452467-vue3-migration-packages_forwarding_settings' into 'master'

Remove Vue set for vue 3 migration

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/156663



Merged-by: Sheldon Led <sheldonled@gitlab.com>
Approved-by: Lukas Wanko <lwanko@gitlab.com>
Approved-by: Sheldon Led <sheldonled@gitlab.com>
Co-authored-by: Artur Fedorov <afedorov@gitlab.com>

app/assets/javascripts/packages_and_registries/settings/group/components/packages_forwarding_settings.vue

@@ -152,7 +152,10 @@ export default {
       }
     },
     updateWorkingCopy(type, value) {
-      this.$set(this.workingCopy, type, value);
+      this.workingCopy = {
+        ...this.workingCopy,
+        [type]: value,
+      };
     },
   },
   links: {