Add a replacement for cmp.Diff using json+go-difflib

Co-authored-by: Jordan Liggitt <jordan@liggitt.net>
Signed-off-by: Davanum Srinivas <davanum@gmail.com>

Kubernetes-commit: 03afe6471bdbf6462b7035fdaae5aa0dd9545396

go.mod

@@ -8,10 +8,10 @@ godebug default=go1.24
 
 require (
 	golang.org/x/time v0.9.0
-	k8s.io/api v0.0.0-20250612195650-7efafe3627c8
-	k8s.io/apimachinery v0.0.0-20250612195403-e0270fe44c97
-	k8s.io/client-go v0.0.0-20250612200049-4e82e684120e
-	k8s.io/code-generator v0.0.0-20250612201326-0ccc8d63d59c
+	k8s.io/api v0.0.0
+	k8s.io/apimachinery v0.0.0
+	k8s.io/client-go v0.0.0
+	k8s.io/code-generator v0.0.0
 	k8s.io/klog/v2 v2.130.1
 )
 
@@ -34,6 +34,7 @@ require (
 	github.com/modern-go/reflect2 v1.0.3-0.20250322232337-35a7c28c31ee // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/spf13/pflag v1.0.6 // indirect
 	github.com/x448/float16 v0.8.4 // indirect
 	golang.org/x/mod v0.21.0 // indirect
@@ -56,3 +57,10 @@ require (
 	sigs.k8s.io/structured-merge-diff/v4 v4.7.0 // indirect
 	sigs.k8s.io/yaml v1.4.0 // indirect
 )
+
+replace (
+	k8s.io/api => ../api
+	k8s.io/apimachinery => ../apimachinery
+	k8s.io/client-go => ../client-go
+	k8s.io/code-generator => ../code-generator
+)