Use k8s.io/utils/ptr in pkg/proxy (#121154)

* Use k8s.io/utils/ptr in pkg/proxy

* Replace pointer.String(), pointer.StringPtr(), and pointer.Bool() with ptr.To()

* Replace pointer.Int32(constexpr) with ptr.To[int32](constexpr)

* Replace pointer.Int32(int32(var)) with ptr.To(int32(var))

* Replace remaining pointer.Int32() cases with ptr.To

* Replace 'tcpProtocol := v1.ProtocolTCP; ... &tcpProtocol', etc with ptr.To(v1.ProtocolTCP)

* Replace 'nodeName = testHostname; ... &nodeName' with ptr.To(testHostname)

* Use ptr.To for SessionAffinityConfig.ClientIP.TimeoutSeconds

* Use ptr.To for InternalTrafficPolicy

* Use ptr.To for LoadBalancer.Ingress.IPMode

pkg/proxy/iptables/number_generated_rules_test.go

@@ -27,7 +27,7 @@ import (
 	"k8s.io/apimachinery/pkg/util/intstr"
 	iptablestest "k8s.io/kubernetes/pkg/util/iptables/testing"
 	netutils "k8s.io/utils/net"
-	"k8s.io/utils/pointer"
+	"k8s.io/utils/ptr"
 )
 
 // kube-proxy generates iptables rules to forward traffic from Services to Endpoints
@@ -361,8 +361,6 @@ func generateServiceEndpoints(nServices, nEndpoints int, epsFunc func(eps *disco
 	baseEp := netutils.BigForIP(netutils.ParseIPSloppy("172.16.0.1"))
 	epPort := 8080
 
-	tcpProtocol := v1.ProtocolTCP
-
 	eps := &discovery.EndpointSlice{
 		ObjectMeta: metav1.ObjectMeta{
 			Name:      "ep",
@@ -371,9 +369,9 @@ func generateServiceEndpoints(nServices, nEndpoints int, epsFunc func(eps *disco
 		AddressType: discovery.AddressTypeIPv4,
 		Endpoints:   []discovery.Endpoint{},
 		Ports: []discovery.EndpointPort{{
-			Name:     pointer.String(fmt.Sprintf("%d", epPort)),
-			Port:     pointer.Int32(int32(epPort)),
-			Protocol: &tcpProtocol,
+			Name:     ptr.To(fmt.Sprintf("%d", epPort)),
+			Port:     ptr.To(int32(epPort)),
+			Protocol: ptr.To(v1.ProtocolTCP),
 		}},
 	}