fix: resolve CI lint and gen-check failures for RateLimitRule name

The CEL validation test used ptr.To from k8s.io/utils/ptr, which is
forbidden by forbidigo (use new() builtin or a typed helper instead).
Replace the 7 ptr.To(...) call sites with a small file-local ptrString
helper that matches the existing SectionNamePtr/ObjectNamePtr convention,
and drop the now-unused ptr import.

The new ratelimit-rule-names testdata YAML was missing a trailing
newline, which fails yamllint's new-line-at-end-of-file rule (part of
make lint / gen-check). Add the trailing newline.

Co-Authored-By: Claude <noreply@anthropic.com>

Author: Aias00

internal/gatewayapi/testdata/backendtrafficpolicy-with-ratelimit-rule-names.in.yaml

@@ -67,4 +67,4 @@ backendTrafficPolicies:
               value: 192.168.0.0/16
           limit:
             requests: 50
-            unit: Hour
+            unit: Hour

test/cel-validation/backendtrafficpolicy_test.go

@@ -17,13 +17,19 @@ import (
 	apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
 	"k8s.io/apimachinery/pkg/api/resource"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	ptr "k8s.io/utils/ptr"
 	gwapiv1 "sigs.k8s.io/gateway-api/apis/v1"
 	gwapiv1a2 "sigs.k8s.io/gateway-api/apis/v1alpha2"
 
 	egv1a1 "github.com/envoyproxy/gateway/api/v1alpha1"
 )
 
+// ptrString returns a pointer to the given string. Used in place of the
+// forbidden k8s.io/utils/ptr.To for *string literal values in test cases.
+func ptrString(s string) *string {
+	v := s
+	return &v
+}
+
 func TestBackendTrafficPolicyTarget(t *testing.T) {
 	ctx := context.Background()
 	baseBTP := egv1a1.BackendTrafficPolicy{
@@ -3744,7 +3750,7 @@ func TestBackendTrafficPolicyTarget(t *testing.T) {
 						Global: &egv1a1.GlobalRateLimit{
 							Rules: []egv1a1.RateLimitRule{
 								{
-									Name: ptr.To("by-ip"),
+									Name: ptrString("by-ip"),
 									Limit: egv1a1.RateLimitValue{
 										Requests: 10,
 										Unit:     "Minute",
@@ -3774,14 +3780,14 @@ func TestBackendTrafficPolicyTarget(t *testing.T) {
 						Global: &egv1a1.GlobalRateLimit{
 							Rules: []egv1a1.RateLimitRule{
 								{
-									Name: ptr.To("dup"),
+									Name: ptrString("dup"),
 									Limit: egv1a1.RateLimitValue{
 										Requests: 10,
 										Unit:     "Minute",
 									},
 								},
 								{
-									Name: ptr.To("dup"),
+									Name: ptrString("dup"),
 									Limit: egv1a1.RateLimitValue{
 										Requests: 20,
 										Unit:     "Minute",
@@ -3813,14 +3819,14 @@ func TestBackendTrafficPolicyTarget(t *testing.T) {
 						Local: &egv1a1.LocalRateLimit{
 							Rules: []egv1a1.RateLimitRule{
 								{
-									Name: ptr.To("dup"),
+									Name: ptrString("dup"),
 									Limit: egv1a1.RateLimitValue{
 										Requests: 10,
 										Unit:     "Minute",
 									},
 								},
 								{
-									Name: ptr.To("dup"),
+									Name: ptrString("dup"),
 									Limit: egv1a1.RateLimitValue{
 										Requests: 20,
 										Unit:     "Minute",
@@ -3852,7 +3858,7 @@ func TestBackendTrafficPolicyTarget(t *testing.T) {
 						Global: &egv1a1.GlobalRateLimit{
 							Rules: []egv1a1.RateLimitRule{
 								{
-									Name: ptr.To("0"),
+									Name: ptrString("0"),
 									Limit: egv1a1.RateLimitValue{
 										Requests: 10,
 										Unit:     "Minute",
@@ -3884,7 +3890,7 @@ func TestBackendTrafficPolicyTarget(t *testing.T) {
 						Global: &egv1a1.GlobalRateLimit{
 							Rules: []egv1a1.RateLimitRule{
 								{
-									Name: ptr.To("a/b"),
+									Name: ptrString("a/b"),
 									Limit: egv1a1.RateLimitValue{
 										Requests: 10,
 										Unit:     "Minute",