Implement custom NetworkSelectionElement Unmarshaler
Implement custom NetworkSelectionElement Unmarshaler

This Unmarshaler bring back support for pre v3.2 "interfaceRequest"
property.

Signed-off-by: giovanism <ddd2a8a9bcaf1be423b4d997b103988f23dd597d@outlook.co.id>

intel/multus-cni,Intel-Corp/multus-cni,intel/multus-cni,Intel-Corp/multus-cni