Test IPv6-only v3 onion services in Chutney's CI, once homebrew tor stable supports them
When #23588 (moved) merges, we should replace single-onion-ipv6-md with single-onion-v23-ipv6-md in Chutney's CI.
When #23588 (moved) merges, we should replace single-onion-ipv6-md with single-onion-v23-ipv6-md in Chutney's CI.