ci: allow working with podman w/o aliases
ci: allow working with podman w/o aliases

Fedora doesn't distribute docker anymore, instead
it uses podman for the containers.
It is possible to alias podman to docker, but
it's less hassle if it will work just out of the box.

The fix here is simple the podman is a fallback if
docker is not found.

Signed-off-by: Tomas Winkler <002a8af089113a6510dbc00453be711ac350fd80@intel.com>

fwupd/fwupd,hughsie/fwupd,fwupd/fwupd,fwupd/fwupd,hughsie/fwupd,hughsie/fwupd,fwupd/fwupd,hughsie/fwupd