Using default CRD version for appmesh GVR

Signed-off-by: Kiran Meduri <meduri@amazon.com>

utils/appmesh/appmesh.go

@@ -3,11 +3,14 @@ package istio
 import (
 	"context"
 
+	"github.com/argoproj/argo-rollouts/utils/defaults"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime/schema"
 	"k8s.io/client-go/dynamic"
 )
 
+const AppMeshCRDGroup = "appmesh.k8s.aws"
+
 func DoesAppMeshExist(dynamicClient dynamic.Interface, namespace string) bool {
 	_, err := dynamicClient.Resource(GetAppMeshVirtualServiceGVR()).Namespace(namespace).List(context.TODO(), metav1.ListOptions{Limit: 1})
 	if err != nil {
@@ -18,24 +21,24 @@ func DoesAppMeshExist(dynamicClient dynamic.Interface, namespace string) bool {
 
 func GetAppMeshVirtualServiceGVR() schema.GroupVersionResource {
 	return schema.GroupVersionResource{
-		Group:    "appmesh.k8s.aws",
-		Version:  "v1beta2",
+		Group:    AppMeshCRDGroup,
+		Version:  defaults.GetAppMeshCRDVersion(),
 		Resource: "virtualservices",
 	}
 }
 
 func GetAppMeshVirtualRouterGVR() schema.GroupVersionResource {
 	return schema.GroupVersionResource{
-		Group:    "appmesh.k8s.aws",
-		Version:  "v1beta2",
+		Group:    AppMeshCRDGroup,
+		Version:  defaults.GetAppMeshCRDVersion(),
 		Resource: "virtualrouters",
 	}
 }
 
 func GetAppMeshVirtualNodeGVR() schema.GroupVersionResource {
 	return schema.GroupVersionResource{
-		Group:    "appmesh.k8s.aws",
-		Version:  "v1beta2",
+		Group:    AppMeshCRDGroup,
+		Version:  defaults.GetAppMeshCRDVersion(),
 		Resource: "virtualnodes",
 	}
 }