Set cleaner to a false dry run (#35500)

Author: ksobrenat32

.test-infra/tools/stale_cleaner.py

@@ -334,4 +334,4 @@ def _delete_resource(self, resource_name: str) -> None:
     cleaner.refresh()
 
     # Delete stale resources
-    cleaner.delete_stale()
+    cleaner.delete_stale(dry_run=False)