Merge pull request #55601 from m1093782566/getlocalips

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 <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Fix ipvs/proxy getLocalIPs inconsistency with iptables/proxy

**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**:

```release-note
NONE
```

pkg/proxy/iptables/proxier.go

@@ -798,7 +798,7 @@ func getLocalIPs(endpointsMap proxyEndpointsMap) map[types.NamespacedName]sets.S
 	for svcPortName := range endpointsMap {
 		for _, ep := range endpointsMap[svcPortName] {
 			if ep.isLocal {
-				// If the endpoint has a bad format, ipPart() will log an
+				// If the endpoint has a bad format, utilproxy.IPPart() will log an
 				// error and ep.IPPart() will return a null string.
 				if ip := ep.IPPart(); ip != "" {
 					nsn := svcPortName.NamespacedName