openqa/worker: add NM-based tap setup and test on p09-worker01
    
    network-scripts-openvswitch was removed in f40 and network-scripts
    is going away in f41; we really need to get off using them.
    This attempts to implement the same setup using NetworkManager,
    based on a few different NM/ovs references, and the source of
    openQA upstream's os-autoinst-setup-multi-machine . It might
    need a bit of tweaking, so for now, we make it a separate task
    and use it only on p09-worker01 for testing. This doesn't handle
    tearing down the old network-scripts-based config as that's
    pretty complex and will only need to happen once; I'll do it
    manually before trying this out.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>