[FEATURE] Use v1beta1 APIs Only

[adambkaplan]

Is there an existing feature request for this?

• I have searched the existing feature requests

Is your feature request related to a problem or use-case? Please describe.

The shp CLI currently uses the v1alpha1 API for all its calls. In order to stop serving the v1alpha1 API, all clients must migrate to the v1beta1 API.

Describe the solution that you would like.

Use the v1beta1 API for all calls. This may require us to deprecate CLI commands or flags/options that rely exclusively on the v1alpha1 API.

Describe alternatives you have considered.

Keep using the v1alpha1 API - this isn't a good long term option. It also blocks us from adopting new features that land in the v1beta1 API only.

Anything else?

No response