[usability] some APIs require project # rather than project

[bcoe]

The Cloud Secrets Manager API requires that a user provide their project #, rather than their project name. This information is buried deep in an account, and creates a real usability hiccup for users, ideally:

1. a project or project # would be optional, and we'd detect the appropriate value.
2. if we see a project provided for parent, rather than project #, we'd translate it to the project # (is this possible?).

[bcoe]

apparently we can provide a project name rather than number in these paths 👍