chore(go): Bump cloud.google.com/go/auth from 0.18.2 to 0.19.0 in /go in the cloud-google-com group

[dependabot]

Bumps the cloud-google-com group in /go with 1 update: cloud.google.com/go/auth.

Updates cloud.google.com/go/auth from 0.18.2 to 0.19.0

Release notes

Sourced from cloud.google.com/go/auth's releases.

auth: v0.19.0

v0.19.0 (2026-03-23)

Features

• add OpenTelemetry gRPC and HTTP wrappers for T4 tracing (#14133) (d38abf98)

Changelog

Sourced from cloud.google.com/go/auth's changelog.

v0.19.0

• bigquery:

  • Support customer-managed encryption keys.

• bigtable:

  • Improved emulator support.
  • Support GetCluster.

• datastore:

  • Add general mutations.
  • Support pointer struct fields.
  • Support transaction options.

• firestore:

  • Add Transaction.GetAll.
  • Support document cursors.

• logging:

  • Support concurrent RPCs to the service.
  • Support per-entry resources.

• profiler:

  • Add config options to disable heap and thread profiling.
  • Read the project ID from $GOOGLE_CLOUD_PROJECT when it's set.

• pubsub:

  • BEHAVIOR CHANGE: Release flow control after ack/nack (instead of after the callback returns).
  • Add SubscriptionInProject.
  • Add OpenCensus instrumentation for streaming pull.

• storage:

  • Support CORS.

v0.18.0

• bigquery:

  • Marked stable.
  • Schema inference of nullable fields supported.
  • Added TimePartitioning to QueryConfig.

• firestore: Data provided to DocumentRef.Set with a Merge option can contain Delete sentinels.

• logging: Clients can accept parent resources other than projects.

• pubsub:

  • pubsub/pstest: A lighweight fake for pubsub. Experimental; feedback welcome.
  • Support updating more subscription metadata: AckDeadline,

... (truncated)

Commits

• 20d4028 README.md: release notes for v0.19.0
• f984a74 cloud: tweak connection pooling doc
• 06da8ec profiler: allow profiler continuous e2e test on every commit
• d62cd63 profiler: disable profiler e2e test on GKE.
• dfdc504 cloud: document connection pooling mechanics and client transports
• 3bef3eb Avoid using T.run() as it's not supported on Go 1.6.
• b4fe94e bigtable: support block_all in emulator
• 6906940 bigtable: emulator timestamp granularity
• b3a1645 Add config options to disable heap and thread profiling.
• 4258834 Read the project ID from $GOOGLE_CLOUD_PROJECT when it's set.
• Additional commits viewable in compare view

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[dependabot]

Looks like cloud.google.com/go/auth is no longer updatable, so this is no longer needed.