[ACS-10175] Notify after adding A/N BDU label (#12102)

* [ACS-10175] Notify after adding A/N BDU label

* [ACS-10175] send notification only for labelling after opening pr

* [ACS-10175] Send notification on open pr only

.github/workflows/notify-on-an-bdu-label.yml

@@ -0,0 +1,33 @@
+name: "Sends notification when A/N BDU label is attached to PR"
+
+on:
+  pull_request:
+    types: [labeled]
+    branches: [develop]
+
+permissions:
+  pull-requests: read
+
+jobs:
+  notify-bdu:
+    name: Notify Teams when A/N BDU label is added
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    if: >-
+      github.event.action == 'labeled' &&
+      github.event.label.name == 'A/N BDU' &&
+      github.event.pull_request.state == 'open'
+    steps:
+      - name: Send Teams notification
+        uses: Alfresco/alfresco-build-tools/.github/actions/send-teams-notification@1d671f8f10336861c89c67be57c6648d98876103 # v18.19.0
+        with:
+          webhook-url: ${{ secrets.TEAMS_NOTIFICATION_ADF_BDU_WEBHOOK }}
+          skip_checkout: true
+          status: success
+          title: "A/N BDU PR: ${{ github.event.pull_request.title }}"
+          message: |
+            A pull request has been marked with the **A/N BDU** label.
+
+            - **Repository:** ${{ github.repository }}
+            - **PR:** [#${{ github.event.pull_request.number }} ${{ github.event.pull_request.title }}](${{ github.event.pull_request.html_url }})
+            - **Author:** ${{ github.event.pull_request.user.login }}