Group owner of Multipass socket on core{18}

[Saviq]

Some references:

• Multiple users and groups in snaps
• https://snapcraft.io/docs/system-usernames

There doesn’t seem anything “automatic” that will help us, should we simply be creating a multipass group in this case (or across the board)?

Prior art:

• LXD creates the lxd group on startup - the disadvantage being that no users get access to the socket “by default”