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/nameserver_test.go

@@ -23,7 +23,6 @@ import (
 	operatorutils "tailscale.com/k8s-operator"
 	tsapi "tailscale.com/k8s-operator/apis/v1alpha1"
 	"tailscale.com/tstest"
-	"tailscale.com/types/ptr"
 	"tailscale.com/util/mak"
 )
 
@@ -35,7 +34,7 @@ func TestNameserverReconciler(t *testing.T) {
 		},
 		Spec: tsapi.DNSConfigSpec{
 			Nameserver: &tsapi.Nameserver{
-				Replicas: ptr.To[int32](3),
+				Replicas: new(int32(3)),
 				Image: &tsapi.NameserverImage{
 					Repo: "test",
 					Tag:  "v0.0.1",
@@ -87,7 +86,7 @@ func TestNameserverReconciler(t *testing.T) {
 		}
 		wantsDeploy.OwnerReferences = []metav1.OwnerReference{*ownerReference}
 		wantsDeploy.Spec.Template.Spec.Containers[0].Image = "test:v0.0.1"
-		wantsDeploy.Spec.Replicas = ptr.To[int32](3)
+		wantsDeploy.Spec.Replicas = new(int32(3))
 		wantsDeploy.Namespace = tsNamespace
 		wantsDeploy.ObjectMeta.Labels = nameserverLabels
 		wantsDeploy.Spec.Template.Spec.Tolerations = []corev1.Toleration{