[Do not merge] Update buf beta registry repository commands to use v1 API

[oliversun9]

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

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.

Do not merge because the implementation of ModuleService.ListModules requires updating.