[ENHANCEMENT] Making NetPol APIs aware of Multi-Networks

[tssurya]

Is your enhancement request related to a problem? Please describe.
ANP/NetPol/BANP APIs are not aware of multi-networks concept, like every other API in kubernetes. However we have a sig-network-multi-network subgroup and we have https://github.com/mskrocki/enhancements/blob/mn-req/keps/sig-network/3698-multi-network/README.md new APIs being designed around this

Describe the solution you'd like
How will our current APIs work with multi-networks?

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
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1. NPEP for Multi-Network Aware (Admin)NetPol API design

[tssurya]

/assign @tssurya