Skip build if "skip build" label is set

manifest-pipeline.yml

@@ -31,6 +31,9 @@ workflow:
 
 .full_build_pipeline:
   rules:
+    # Do not run build if the "skip build" label is set on the merge request
+    - if: $CI_MERGE_REQUEST_LABELS =~ /skip build/
+      when: never
     # Run the full build pipeline on non-master branches (i.e. in the merge request)
     # or if explicitly triggered by the API or the web button.
     - if: $CI_COMMIT_REF_NAME != $MASTER_BRANCH