Enhance changelog workflow to check for missing labels

Signed-off-by: Kunal Kotwani <[email protected]>

.github/workflows/changelog_verifier.yml

@@ -27,5 +27,13 @@ jobs:
         continue-on-error: true
       - run: |
           if [[ ${{ steps.verify-changelog-3x.outcome }} == 'failure' && ${{ steps.verify-changelog.outcome }} == 'failure' ]]; then
+            echo "error: Please ensure a changelog entry exists in CHANGELOG.md or CHANGELOG-3.0.md"
+            exit 1
+          fi
+          
+          # Concatenates the labels and checks if the string contains "backport"
+          has_backport_label=${{ contains(join(github.event.pull_request.labels.*.name, ', '), 'backport')}}
+          if [[ ${{ steps.verify-changelog.outcome }} == 'success' && $has_backport_label == false ]]; then
+            echo "error: Please make sure that the PR has a backport label associated with it when making an entry to the CHANGELOG.md file"
             exit 1
           fi