Now ubuntu also uses the updated way of preparing iaas instances like
debian did before, actually the debian scripts have been remade to also
handle ubuntu so we use a common code path.
Usage (what scripts to call) stay the same, but the underlying
operations takes less logins to complete.
* Log in as few times as possible to not require a lot if yubikey
keypresses
* Make sure en_US.UTF-8 is present
* Replace `rm -rf` with userdel command
* Make sure the debian account is actually deleted
* Remove locale related warnings when running script from macOS