Update the libguestfs-appliance
Update the libguestfs-appliance

Use the new appliance with the root in qcow2 format

Signed-off-by: Alice Frosi <93920af21f2e5725c81babb78c15f887c6026b77@redhat.com>

kubevirt/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt