Add authorization mode to kubeadm

pkg/api/testing/fuzzer.go

@@ -562,6 +562,7 @@ func FuzzerFor(t *testing.T, version schema.GroupVersion, src rand.Source) *fuzz
 			obj.API.Port = 20
 			obj.Networking.ServiceSubnet = "foo"
 			obj.Networking.DNSDomain = "foo"
+			obj.AuthorizationMode = "foo"
 			obj.Discovery.Token = &kubeadm.TokenDiscovery{}
 		},
 		func(s *policy.PodDisruptionBudgetStatus, c fuzz.Continue) {