fix(lint): fix modernize linter issues

Update Go version to 1.26 in .golangci.yml to resolve modernize linter
errors that appeared after Go 1.26.0 upgrade.

Author: camilamacedo86

.golangci.yml

@@ -1,6 +1,6 @@
 version: "2"
 run:
-  go: "1.25"
+  go: "1.26"
   timeout: 10m
   modules-download-mode: readonly
   allow-parallel-runners: true

go.mod

@@ -21,7 +21,6 @@ require (
 	k8s.io/code-generator v0.36.0
 	k8s.io/gengo/v2 v2.0.0-20250922181213-ec3ebc5fd46b
 	k8s.io/kube-openapi v0.0.0-20260317180543-43fb72c5454a
-	k8s.io/utils v0.0.0-20260210185600-b8788abfbbc2
 	sigs.k8s.io/yaml v1.6.0
 )
 
@@ -91,6 +90,7 @@ require (
 	k8s.io/client-go v0.36.0 // indirect
 	k8s.io/component-base v0.36.0 // indirect
 	k8s.io/klog/v2 v2.140.0 // indirect
+	k8s.io/utils v0.0.0-20260210185600-b8788abfbbc2 // indirect
 	sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.34.0 // indirect
 	sigs.k8s.io/json v0.0.0-20250730193827-2d320260d730 // indirect
 	sigs.k8s.io/randfill v1.0.0 // indirect

pkg/applyconfiguration/testdata/cronjob/api/v1/applyconfiguration/internal/internal.go

@@ -20,7 +20,6 @@ import (
 	"maps"
 
 	apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
-	"k8s.io/utils/ptr"
 	"sigs.k8s.io/controller-tools/pkg/loader"
 )
 
@@ -69,7 +68,7 @@ var KnownPackages = map[string]PackageOverride{
 		p.Schemata[TypeIdent{Name: "RawExtension", Package: pkg}] = apiextensionsv1.JSONSchemaProps{
 			// TODO(directxman12): regexp validation for this (or get kube to support it as a format value)
 			Type:                   "object",
-			XPreserveUnknownFields: ptr.To(true),
+			XPreserveUnknownFields: new(true),
 		}
 		p.AddPackage(pkg) // get the rest of the types
 	},
@@ -94,13 +93,13 @@ var KnownPackages = map[string]PackageOverride{
 
 	"k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1": func(p *Parser, pkg *loader.Package) {
 		p.Schemata[TypeIdent{Name: "JSON", Package: pkg}] = apiextensionsv1.JSONSchemaProps{
-			XPreserveUnknownFields: ptr.To(true),
+			XPreserveUnknownFields: new(true),
 		}
 		p.AddPackage(pkg) // get the rest of the types
 	},
 	"k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1": func(p *Parser, pkg *loader.Package) {
 		p.Schemata[TypeIdent{Name: "JSON", Package: pkg}] = apiextensionsv1.JSONSchemaProps{
-			XPreserveUnknownFields: ptr.To(true),
+			XPreserveUnknownFields: new(true),
 		}
 		p.AddPackage(pkg) // get the rest of the types
 	},

pkg/crd/known_types.go

@@ -781,8 +781,7 @@ func (d *Definition) loadFields() error {
 		return nil
 	}
 
-	for i := 0; i < d.Output.NumField(); i++ {
-		field := d.Output.Field(i)
+	for field := range d.Output.Fields() {
 		if field.PkgPath != "" {
 			// as per the reflect package docs, pkgpath is empty for exported fields,
 			// so non-empty package path means a private field, which we should skip