types/ptr: deprecate ptr.To, use Go 1.26 new

Updates #18682

Change-Id: I62f6aa0de2a15ef8c1435032c6aa74a181c25f8f
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

cmd/k8s-operator/e2e/proxygrouppolicy_test.go

@@ -13,7 +13,6 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 
 	tsapi "tailscale.com/k8s-operator/apis/v1alpha1"
-	"tailscale.com/types/ptr"
 )
 
 // See [TestMain] for test requirements.
@@ -82,7 +81,7 @@ func TestProxyGroupPolicy(t *testing.T) {
 		},
 		Spec: corev1.ServiceSpec{
 			Type:              corev1.ServiceTypeLoadBalancer,
-			LoadBalancerClass: ptr.To("tailscale"),
+			LoadBalancerClass: new("tailscale"),
 			Ports: []corev1.ServicePort{
 				{
 					Port:     8080,
@@ -112,7 +111,7 @@ func TestProxyGroupPolicy(t *testing.T) {
 			},
 		},
 		Spec: networkingv1.IngressSpec{
-			IngressClassName: ptr.To("tailscale"),
+			IngressClassName: new("tailscale"),
 			DefaultBackend: &networkingv1.IngressBackend{
 				Service: &networkingv1.IngressServiceBackend{
 					Name: "nginx",