Don't run notify gitlab ci changes on merge queue (#32293)

Author: CelianR

.gitlab/notify/notify.yml

@@ -80,8 +80,8 @@ notify_github:
   script:
     - !reference [.setup_agent_github_app]
     # Python 3.12 changes default behavior how packages are installed.
-    # In particular, --break-system-packages command line option is 
-    # required to use the old behavior or use a virtual env. https://github.com/actions/runner-images/issues/8615      
+    # In particular, --break-system-packages command line option is
+    # required to use the old behavior or use a virtual env. https://github.com/actions/runner-images/issues/8615
     - python3 -m pip install -r tasks/libs/requirements-github.txt --break-system-packages
     - messagefile="$(mktemp)"
     - echo "Use this command from [test-infra-definitions](https://github.com/DataDog/test-infra-definitions) to manually test this PR changes on a VM:" >> "$messagefile"
@@ -98,15 +98,16 @@ notify_gitlab_ci_changes:
   needs: [compute_gitlab_ci_config]
   tags: ["arch:amd64"]
   rules:
+    - !reference  [.except_mergequeue]
     - changes:
         paths:
           - .gitlab-ci.yml
           - .gitlab/**/*.yml
         compare_to: main # TODO: use a variable, when this is supported https://gitlab.com/gitlab-org/gitlab/-/issues/369916
   script:
     # Python 3.12 changes default behavior how packages are installed.
-    # In particular, --break-system-packages command line option is 
-    # required to use the old behavior or use a virtual env. https://github.com/actions/runner-images/issues/8615    
+    # In particular, --break-system-packages command line option is
+    # required to use the old behavior or use a virtual env. https://github.com/actions/runner-images/issues/8615
     - python3 -m pip install -r tasks/libs/requirements-github.txt --break-system-packages
     - !reference [.setup_agent_github_app]
     - inv -e notify.gitlab-ci-diff --from-diff artifacts/diff.gitlab-ci.yml --pr-comment