feat: update API sources and regenerate (#14661)

This PR is changes generated by:

```
# Use the librarian version in librarin.yaml
V=$(go run github.com/googleapis/librarian/cmd/librarian@latest config get version)

# Update sources (using hierarchical notation)
go run github.com/googleapis/librarian/cmd/librarian@${V} update sources.googleapis

# Regenerate (around 5 minutes)
go run github.com/googleapis/librarian/cmd/librarian@${V} generate --all
```

Author: suztomo