Provide vDPA support in the SRIOV-network-operator:

• SriovNetworkNodePolicy: keep deviceType meaning “driver bound to PCI device” and add a field called vdpaType to select the type of vdpa device (virtio/vhost).
• We need to add a runtime check to verify that a user does not specify { “deviceType”:  “vfio-pci”, “vdpaType”: “virtio” } because that doesn’t make sense.
• Render the vdpaType (virtio/vhost) in the ConfigMap for the SRIOV-device-plugin
• Create a vDPA devices for each VF (interacting with govdpa library)
• Bind the relevant vDPA drivers to VFs
• Ensure OVS offloading is enabled on PF, VFs and port representors