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.

• Cloud Quotas

AI Platform/Vertex AI

• feat(aiplatform): add new service proto file (#13325)

Bigtable

• fix(bigtable): use FQDN (#13305)

OpenTelemetry

• feat(otel): capture gRPC response metadata in traces (#13278)

Pub/Sub

• fix(pubsub): get future value before returning (#13241)
• fix(pubsub): pass by reference explicitly (#13220)

Common Libraries

• fix(common): returnable argument to .then() (#13316)
• feat(common): read-write streaming RPCs metadata (#13228)
• fix: respect logging format env var in compute, sql (#13368)