In RESTEasy Classic, even when an interface is annotated with @RegisterRestClient, the interface is not considered a REST Client if it has implementations.
It is not consistent with Quarkus REST and is annoying when you have both the client and the server parts in the same application.

It was reported by a user here: https://quarkusio.zulipchat.com/#narrow/channel/187030-users/topic/Synthetic.20bean.20generation.20for.20.40RestClient/with/513892718 .

And I think the intention is pretty clear when you have an explicit `@RegisterRestClient` annotation.