When randomly choosing IPv4 or IPv6, log better IPv6 preference info
connection_connect_log_client_use_ip_version() logs an info-level message when ClientPreferIPv6ORPort isn't satisfied: https://github.com/torproject/tor/blob/df2b46d18c4a3d6e5eb364f80111ef6c7811383c/src/core/mainloop/connection.c#L2019
We should update it for ClientAutoIPv6ORPort.