Move to google.cloud.spanner_v1 (googleapis#4064)

Bump video version number. (googleapis#3995)

Video Intelligence: Fix import issue (googleapis#3985)

Video Intelligence v0.27.0 (googleapis#3977)

Natural Language 0.29.0 (googleapis#3972)

Pubsub 0.28.3 (googleapis#3921)

Tag core-0.27.1 release.

Fix RST ambiguity.

Updating 10 packages after google-cloud-core==0.27.0 (googleapis#3866)

- dns
- error_reporting
- language
- logging
- monitoring
- resource_manager
- runtimeconfig
- speech
- translate
- vision

Also updating bounds on these in `google-cloud` uber-package.

Update pubsub in monopackage. (googleapis#3872)