refactor: trigger CI failure notifier on all pull requests and move failure check to step level

Author: JhaSourav07

.github/workflows/ci-failure-notifier.yml

@@ -12,13 +12,12 @@ permissions:
 
 jobs:
   notify-ci-failure:
-    # Only act when CI failed and was triggered by a pull_request event
-    if: >
-      github.event.workflow_run.conclusion == 'failure' &&
-      github.event.workflow_run.event == 'pull_request'
+    # Act when CI completes and was triggered by a pull_request event
+    if: github.event.workflow_run.event == 'pull_request'
     runs-on: ubuntu-latest
     steps:
       - name: Add label and comment on failing PR
+        if: github.event.workflow_run.conclusion == 'failure'
         uses: actions/github-script@v7
         with:
           script: |