Provide a proxable Cache API to get create queries

It is not possible to pass a proxy of org.infinispan.client.hotrod.RemoteCache to the static method org.infinispan.client.hotrod.Search#getQueryFactory(RemoteCache) to get a QueryFactory, this cast will not work with it.

At least for the remote query (optionally for the embedded query) we want to provide a cache level API to get the query factory also from a proxy.