Run chromatic ci with label (#33507)

* Run chromatic CI job when there is a label called chromatic

* Fix: Run chromatic job when one of the labels is chromatic

* Run frontend checks when a new label is added - this will cover adding chromatic label too

* added unlabeled event to frontend workflow

* undo formatting changes

.github/workflows/frontend.yml

@@ -6,7 +6,7 @@ on:
       - "master"
       - "release-**"
   pull_request:
-    types: [opened, synchronize, reopened, ready_for_review]
+    types: [opened, synchronize, reopened, ready_for_review, labeled, unlabeled]
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref && github.ref || github.run_id }}