Support primary network

[qinqon]

What this PR does / why we need it:

This PR add support for ovn-kubernetes primary networks by doing a pair of things:

• Creating an IPAMClaim if there is a primary network at namespace
• Annotating the virt-launcher pod with k8s.ovn.org/ovn-udn-ipamclaim-reference

TODO:

• controller unit test
• webhook unit test
• e2e test

Release note:

Support ovn-kubernetes primary network feature.

[maiqueb]

/approve

Let's get this one in now.

Thanks, good work.

[kubevirt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: maiqueb

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[RamLavi]

I like how this makes the webhook Handle function much more readable
/lgtm

[oshoval]

i guess we want it to be deployed by CNAO
for that please create a tag so it would be bumped on CNAO (EDIT - done)
and then need to also backport it to stable CNAO branch 0.95.0