tests/functional/test_virtio_version: Check for the availability of the machine

Use self_set_machine() to set and check for the availability of the
default pc machine (so that the test is not failing if the machine
has not been included in the QEMU binary).

Message-ID: <20241128120142.593408-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
1 file changed