Use a ConsistentHashFactory for consistent hash configuration

The new programmatic configuration allows the user to configure a consistent hash with `HashConfigurationBuilder.consistentHash(ConsistentHash)`.

Since we always create new instances of the consistent hash, I think it would be nicer if we had `HashConfigurationBuilder.consistentHashFactory(ConsistentHashFactory)` instead.

This would also allow us to have a single default factory that can choose between creating a `DefaultconsistentHash` or a `TopologyAwareConsistentHash` based on the transport configuration.