Conformance tests cannot run on v1.2.0

[howardjohn]

What happened: Almost all conformance tests fail on 1.2.0 with errors like no kind is registered for the type v1.Gateway in scheme

What you expected to happen: Conformance tests can run

This is caused by #3211. This overrides the passed in Client, Clientset and RestConfig. This overrides any customizations we make to those, notably the scheme (but not ONLY the scheme, so its likely we will want a fix that is not scoped to that).

I believe how its working in any case is due to controller-runtime using the global scheme from client-go by default, then DefaultOptions taking that and installing. If you don't use DefaultOptions then you don't hit this path