Enable custom aws route controller manager if no provider config is s…

…pecified.

The custom aws route controller manager is essential to the shoot cluster
working without overlay network. Therefore, it needs to be enabled regardless
if there is a provider configuration or not. Otherwise, shoot clusters will
get no overlay, but no pod routes.

pkg/webhook/controlplane/ensurer.go

@@ -667,25 +667,25 @@ func (c *controlPlaneMutator) Mutate(ctx context.Context, new, old client.Object
 		if greaterEqual122 {
 			switch x.Name {
 			case cluster.Shoot.Name:
+				config := &awsv1alpha1.ControlPlaneConfig{
+					TypeMeta: metav1.TypeMeta{
+						APIVersion: awsv1alpha1.SchemeGroupVersion.String(),
+						Kind:       "ControlPlaneConfig",
+					},
+				}
 				if x.Spec.ProviderConfig != nil && x.Spec.ProviderConfig.Raw != nil {
-					config := &awsv1alpha1.ControlPlaneConfig{
-						TypeMeta: metav1.TypeMeta{
-							APIVersion: awsv1alpha1.SchemeGroupVersion.String(),
-							Kind:       "ControlPlaneConfig",
-						},
-					}
 					if _, _, err := decoder.Decode(x.Spec.ProviderConfig.Raw, nil, config); err != nil {
 						return err
 					}
-					if config.CloudControllerManager == nil {
-						config.CloudControllerManager = &awsv1alpha1.CloudControllerManagerConfig{}
-					}
-					if config.CloudControllerManager.UseCustomRouteController == nil {
-						extensionswebhook.LogMutation(c.logger, x.Kind, x.Namespace, x.Name)
-						config.CloudControllerManager.UseCustomRouteController = pointer.Bool(true)
-						x.Spec.ProviderConfig = &runtime.RawExtension{
-							Object: config,
-						}
+				}
+				if config.CloudControllerManager == nil {
+					config.CloudControllerManager = &awsv1alpha1.CloudControllerManagerConfig{}
+				}
+				if config.CloudControllerManager.UseCustomRouteController == nil {
+					extensionswebhook.LogMutation(c.logger, x.Kind, x.Namespace, x.Name)
+					config.CloudControllerManager.UseCustomRouteController = pointer.Bool(true)
+					x.Spec.ProviderConfig = &runtime.RawExtension{
+						Object: config,
 					}
 				}
 			}