@Provider annotation doesn't work with ClientRequestFilter

Steps to reproduce:

1. https://github.com/xstefank/reproducers/tree/master/jaxrs-filters
2. deploy the app
3. curl localhost:8080/jaxrs-filters/ping
4. remove javax.ws.rs.ext.Providers
5. curl localhost:8080/jaxrs-filters/ping
6. custom ClientRequestFilter is not invoked

This is violation of chapter 6.1 of jax-rs spec:

A client filter is a class that implements ClientRequestFilter or ClientResponseFilter or both. A container filter is a class that implements ContainerRequestFilter or ContainerResponseFilter, or both. An entity interceptor is a class that implements ReaderInterceptor or WriterInterceptor, or both. Filters and entity interceptors are providers and, as such, may be annotated with @Provider for automatic discovery.

This is not a regression against RESTEasy 3.0.24.Final (WF11) or RESTEasy 3.0.16.Final

cc mstefank