This resolves ENG-8055. I broke this while working on ENG-7667.
When I extracted keyserverAuth into useRegistrationServerCall, I made that step a necessary part. I should have considered that we are still supporting !usingCommServicesAccessToken in the new registration, and that the keyserverAuth step should be skipped when !usingCommServicesAccessToken, since auth with the keyserver is handled in the first step.