chore(librarian): preserve test_iam_logging.py

Author: parthea

.librarian/state.yaml

@@ -2167,6 +2167,7 @@ libraries:
       - scripts/client-post-processing
       - samples/snippets/README.rst
       - tests/system
+      - tests/unit/gapic/iam_logging_v1/test_iam_logging.py
     remove_regex:
       - packages/google-cloud-iam-logging
     tag_format: '{id}-v{version}'