Add Archlinux Toolbox

[palazzem]

Overview

This PR is a follow-up after the work done on Toolbox repository (ref: containers/toolbox#328). The idea is:

• Have a working image to evaluate toolbox with my current configuration
• Keep the image smaller, so that I can leverage Hanzo to prepare the toolbox

The original PR produced a valid image, that unfortunately wasn't working on my toolbox. The following changes were made to make it work:

1. machine-id is not present on the base image, so it has been added to prevent mount-bind failure
2. $(whoami) must be in the sudoer list without password, otherwise it's not possible to execute sudo from the main user

Usage:

$ podman build -t test-toolbox .
$ toolbox create -i localhost/test-toolbox -c test
$ toolbox enter --container testing

# You should see this but with your username:
# [palazzem@toolbox ~]$

I'm testing this configuration with the box I'm using daily. If it works properly, I will contribute back to the original PR, making the change more generic and not specific to my configuration.