Fix ipvs/proxy getLocalIPs inconsistency with iptables/proxy

[m1093782566]

What this PR does / why we need it:

• Fix ipvs/proxy getLocalIPs() inconsistency with iptables/proxy

• validate the ip address before pkg/proxy/util IPPart() return ip string.

Which issue(s) this PR fixes :
Fixes #55612

Special notes for your reviewer:

Release note:

NONE

[m1093782566]

@thockin

BTW, I still suggest a code refactor in kube-proxy, especially abstract the serviceInfo and endpointsInfo to reduce the huge code duplication between ipvs proxy and iptables proxy. By doing that, it can reduce the possibility of inconsistency as well.

[thockin]

/lgtm
/approve

[k8s-github-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: m1093782566, thockin

Associated issue: 55612

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• pkg/proxy/OWNERS [thockin]

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[fejta-bot]

/retest
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[k8s-github-robot]

Automatic merge from submit-queue (batch tested with PRs 55009, 55532, 55601, 52569, 55533). If you want to cherry-pick this change to another branch, please follow the instructions here.