Currently we are shipping no data about quadlet, since the
podman-systemd.unit file is not shipped. Also want to add the
quadlet name to the description of the man page so that
man -k quadlet
will help users find the man page.
Also add a link file such that if the user types in
man quadlet
man will show the podman-systemd.unit file.
Also eliminate the subpackage podman-quadlet
Fixes: https://github.com/containers/podman/issues/17349
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>