net: posix: generalize get_af_inet_posix_connected_socket_ops for non-inet families
net: posix: generalize get_af_inet_posix_connected_socket_ops for non-inet families

Allow it to get unix domain socket operations too.

avikivity/seastar,syuu1228/seastar,cloudius-systems/seastar,cloudius-systems/seastar,scylladb/seastar,avikivity/seastar,avikivity/seastar,cloudius-systems/seastar,syuu1228/seastar,dreamsxin/seastar,dreamsxin/seastar,dreamsxin/seastar,scylladb/seastar,scylladb/seastar,syuu1228/seastar