New Libraries

We are happy to announce the following GA libraries. Unless specifically noted,
the APIs in these libraries are stable, and are ready for production use.

• Personalized Service Health

Bigtable

• feat(bigtable): support bigtable routing cookies (#13502)
• feat(bigtable): logging for bulk apply throttling (#13488)

Pub/Sub

• fix(pubsub): install admin mocks (#13537)
• feat(pubsub): add lease management for unary pull (#13428)

Storage

• feat(storage): support UniverseDomainOption (#13471)
• docs(GCS+gRPC): better comments for AsyncConnection (#13424)

Common Libraries

• feat: support UniverseDomainOption in gRPC IAM stub (#13466)
• feat: simplify Bazel initialization (#13411)