chore: add notifications

[skip ci]

.github/workflows/clean_up.yaml

@@ -34,6 +34,15 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v6
 
+      - name: Notify Google Chat
+        if: ${{ always() }} # Use always to ensure that the notification is also send on failure of former steps
+        uses: SimonScholz/google-chat-action@main
+        with:
+          webhookUrl: '${{ secrets.GOOGLE_WEBHOOK_URL }}'
+          jobStatus: '${{ job.status }}'
+          title: CI pipeline
+          subtitle: "on: ${{ github.event_name }} \n<br />with filter prefix: ${{ inputs.res_prefix }}"
+
       - name: Notify
         uses: ./.github/actions/notify
         with: