Build: Bump google-auth from 2.56.3 to 2.57.0

[dependabot]

Bumps google-auth from 2.56.3 to 2.57.0.

Release notes

Sourced from google-auth's releases.

google-auth: v2.57.0

2.57.0 (2026-08-21)

Features

• auth: add deprecation warning for grpcio < 1.83.0 (PQC support) (#18070) (68bdaba)

Bug Fixes

• auth: parse hostname for mTLS and PSC endpoint certificate rotat… (#18153) (b642373)
• auth: prevent TypeError and support home-dir cert fallback for X… (#18016) (b9a1379)

Documentation

• handwritten: centralize CONTRIBUTING.rst pointers (#17642) (23b9499)

Commits

• 3e29682 chore: release main (#18013)
• b4d9717 feat: check python and dependency versions in spanner packages (#18177)
• 66794a0 chore(bigtable): Rerouted legacy client row filters to data client row filter...
• b42122e Revert "fix(auth): parse hostname for mTLS and PSC endpoint certifica… (#18189)
• e20796a fix(google-auth-oauthlib): prevent port re-use on windows (#18166)
• b642373 fix(auth): parse hostname for mTLS and PSC endpoint certificate rotat… (#18153)
• 5bc3899 feat(spanner): add DataBoost and auto_partition_mode support to DBAPI driver ...
• 2b056ab docs(django-spanner, common-protos): centralize CONTRIBUTING.rst pointers (#1...
• 91d5e2a chore(bigtable): added warning to MutationsBatcher (#18176)
• 23b9499 docs(handwritten): centralize CONTRIBUTING.rst pointers (#17642)
• Additional commits viewable in compare view

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[ebyhr]

==================================== ERRORS ====================================
__________ ERROR collecting tests/catalog/test_bigquery_metastore.py ___________
tests/catalog/test_bigquery_metastore.py:21: in <module>
    from google.cloud.bigquery import Dataset, DatasetReference, Table, TableReference
.venv/lib/python3.13/site-packages/google/cloud/bigquery/__init__.py:37: in <module>
    from google.cloud.bigquery.client import Client
.venv/lib/python3.13/site-packages/google/cloud/bigquery/client.py:49: in <module>
    import google.cloud._helpers  # type: ignore
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.venv/lib/python3.13/site-packages/google/cloud/_helpers/__init__.py:37: in <module>
    import google.auth.transport.grpc
.venv/lib/python3.13/site-packages/google/auth/transport/grpc.py:44: in <module>
    warnings.warn(
E   FutureWarning: grpcio < 1.83.0 does not support Post-Quantum Cryptography (PQC). Support for non-PQC environments is deprecated. In October 2026, google-auth will raise its minimum requirements to enforce grpcio >= 1.83.0. For more details on Google Cloud's post-quantum security migration, visit: https://cloud.google.com/security/resources/post-quantum-cryptography
=========================== short test summary info ============================
ERROR tests/catalog/test_bigquery_metastore.py - FutureWarning: grpcio < 1.83.0 does not support Post-Quantum Cryptography (PQC). Support for non-PQC environments is deprecated. In October 2026, google-auth will raise its minimum requirements to enforce grpcio >= 1.83.0. For more details on Google Cloud's post-quantum security migration, visit: https://cloud.google.com/security/resources/post-quantum-cryptography
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=============================== 1 error in 3.38s ===============================