Upgrade AdmissionReview e2e test image to also support v1

pkg/apis/admission/fuzzer/fuzzer.go

@@ -17,10 +17,23 @@ limitations under the License.
 package fuzzer
 
 import (
+	fuzz "github.com/google/gofuzz"
+
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	"k8s.io/apimachinery/pkg/runtime"
 	runtimeserializer "k8s.io/apimachinery/pkg/runtime/serializer"
 )
 
 // Funcs returns the fuzzer functions for the admission api group.
 var Funcs = func(codecs runtimeserializer.CodecFactory) []interface{} {
-	return []interface{}{}
+	return []interface{}{
+		func(s *runtime.RawExtension, c fuzz.Continue) {
+			u := &unstructured.Unstructured{Object: map[string]interface{}{
+				"apiVersion": "unknown.group/unknown",
+				"kind":       "Something",
+				"somekey":    "somevalue",
+			}}
+			s.Object = u
+		},
+	}
 }