Add vDPA support

[amorenoz]

vDPA support is being added to the SR-IOV Network Device Plugin (k8snetworkplumbingwg/sriov-network-device-plugin#305).

What would you like to be added?

The SR-IOV CNI should handle vDPA devices properly. The expected behaviour:

• For devices bound to vhost-vdpa, they should be treated as DPDK devices:
  • The access to the device is handled by the SR-IOV Network Device Plugin
  • There is no netdevice
• For devices bound to virtio-vdpa, a netdevice is created in the parent (i.e: the pci device) so it should be treated as a standard sr-iov + netdev device