Add a separate stage to the Dockerfile to build the root file system of the tar archive and make the tar targets within the Makefile build that stage.
Relates to #120
Add quadlet binary and register it as systemd unit generator.
When the tar archive is installed on a systemd-enabled host, the quadlet is called by systemd on `systemctl daemon-reload` to generate unit files based on *.container files within `/etc/containers/systemd`.
The quadlet binary is not contained within the minimal image (because it is actually meant to be published with the tar archive only since systemd is not used inside the container).
* podman 5.1.1
* drop CNI networking and slirp4netns in favour of netavark + pasta
* build statically linked netavark, pasta and aardvark
* conmon 2.1.11
* crun 1.15
* crun is also shipped with the normal (non-minimal) image now.
* build using golang 1.22, use alpine 3.19 base container
Co-authored-by: Trent Apple <trentapple@users.noreply.github.com>
