[release-1.24] cherry pick #3212 and #3232 to release-1.24

[nilo19]

What type of PR is this?

/kind bug

What this PR does / why we need it:

Cherry pick #3212 and #3232 to release-1.24.
#3212: fix: skip removing nics from lb if there will be no nics in the backend pool
#3232: fix: update network api to 2022-07-01 to support backend pool level virtual network id

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

fix: skip removing nics from lb if there will be no nics in the backend pool
update network api to 2022-07-01 to support backend pool level virtual network id

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: nilo19

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• OWNERS [nilo19]

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[coveralls]

Coverage: 80.086% (+0.06%) from 80.025% when pulling b83586c on nilo19:cherry-pick-3212-3232-1.24 into ffa3651 on kubernetes-sigs:release-1.24.

[nilo19]

/retest

[lzhecheng]

/lgtm