fix: Restore push trigger with path filters for azure-dev.yml

Keep dev's workflow structure while adding back push trigger with
path filters for infra/**, azure*.yaml, and workflow file changes.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: Prekshith-Microsoft

.github/workflows/azure-dev.yml

@@ -1,6 +1,13 @@
 name: Azure Dev Deploy
 on:
   workflow_dispatch:
+  push:
+    branches:
+      - main
+    paths:
+      - 'infra/**'
+      - 'azure*.yaml'
+      - '.github/workflows/azure-dev.yml'
 
 
 permissions: