Add gvk to rest of api type

Signed-off-by: Somtochi Onyekwere <somtochionyekwere@gmail.com>

cmd/flux/kustomization.go

@@ -25,8 +25,9 @@ import (
 // kustomizev1.Kustomization
 
 var kustomizationType = apiType{
-	kind:      kustomizev1.KustomizationKind,
-	humanKind: "kustomizations",
+	kind:         kustomizev1.KustomizationKind,
+	humanKind:    "kustomization",
+	groupVersion: kustomizev1.GroupVersion,
 }
 
 type kustomizationAdapter struct {