librarian: generation failed for `google-cloud-gke-hub`

[ohmayr]

Generation for google-cloud-gke-hub failed as per #15521

[parthea]

==================================== ERRORS ====================================
_________ ERROR collecting tests/unit/gapic/gkehub_v1/test_gke_hub.py __________
ImportError while importing test module '/repo/packages/google-cloud-gke-hub/tests/unit/gapic/gkehub_v1/test_gke_hub.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/local/lib/python3.14/importlib/__init__.py:88: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
tests/unit/gapic/gkehub_v1/test_gke_hub.py:68: in <module>
    import google.cloud.gkehub.rbacrolebindingactuation.v1.rbacrolebindingactuation_pb2 as rbacrolebindingactuation_pb2  # type: ignore
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
google/cloud/gkehub/__init__.py:21: in <module>
    from google.cloud.gkehub_v1.services.gke_hub.async_client import GkeHubAsyncClient
google/cloud/gkehub_v1/__init__.py:31: in <module>
    from .services.gke_hub import GkeHubAsyncClient, GkeHubClient
google/cloud/gkehub_v1/services/gke_hub/__init__.py:16: in <module>
    from .async_client import GkeHubAsyncClient
google/cloud/gkehub_v1/services/gke_hub/async_client.py:53: in <module>
    from google.cloud.gkehub_v1.services.gke_hub import pagers
google/cloud/gkehub_v1/services/gke_hub/pagers.py:41: in <module>
    from google.cloud.gkehub_v1.types import feature, fleet, membership, service
google/cloud/gkehub_v1/types/__init__.py:16: in <module>
    from .feature import (
google/cloud/gkehub_v1/types/feature.py:25: in <module>
    import google.cloud.gkehub.rbacrolebindingactuation.v1.rbacrolebindingactuation_pb2 as rbacrolebindingactuation_pb2  # type: ignore
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
E   ModuleNotFoundError: No module named 'google.cloud.gkehub.rbacrolebindingactuation'
=========================== short test summary info ============================