[native] Handle client version unsupported errors in registrationServerCall

Summary:
We were handling these in some places, but not all. This diff makes sure we handle it all places in registrationServerCall, which gets us closer to resolving ENG-8113.

Depends on D12084

Test Plan:
There are a lot of spots here, and I didn't check all of them. I verified the core parts:

1. That identity service returns Unsupported version and keyserver returns client_version_unsupported when the client version is outdated
2. That the Alerts showed correctly
3. That onAlertAcknowledged worked

Reviewers: inka

Reviewed By: inka

Subscribers: tomek

Differential Revision: https://phab.comm.dev/D12085