Update buf beta registry repository commands to use v1 API (#3030)

Update `buf beta registry repository [create, delete, deprecate, get,
list, undeprecate, update]` to use v1 APIs (`ModuleService`).

The only behavioral change is updating the `RepositoryPrinter`'s headers
from `Full name` and `Created` to `Full Name` and `Create Time`.

Keep most of the variable names consistent with the existing code, when
it comes to `module` vs `repository`. However, the oddity comes from the
fact that most of these variables have type `modulev1.Module`. I'm happy
to do a follow-up if that's desired.