Problem statement

Referencing a ControlPlane via an ID has been implemented via mirror fields (part of #1469). This has made konnectID reference type in API unnecessary.

This task tracks the effort to remove it altogether from API.

This should not be treated as a breaking change since using that field is protected via CEL validation rules and it's not possible to be used, e.g.

Acceptance criteria

• konnectID ControlPlane reference type is not available in the API anymore.