Update the error to detect when the server only has v1beta1 CRDs

It's unclear what package upgrade prompted this change, however, the
existing error detection no longer worked when running on OpenShift 3.11.

Relates:
https://issues.redhat.com/browse/ACM-9533

Signed-off-by: mprahl <mprahl@users.noreply.github.com>

controllers/templatesync/template_sync.go

@@ -37,6 +37,7 @@ import (
 	"open-cluster-management.io/governance-policy-propagator/controllers/common"
 	ctrl "sigs.k8s.io/controller-runtime"
 	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/client/apiutil"
 	"sigs.k8s.io/controller-runtime/pkg/controller"
 	"sigs.k8s.io/controller-runtime/pkg/handler"
 	"sigs.k8s.io/controller-runtime/pkg/reconcile"
@@ -51,8 +52,8 @@ const (
 )
 
 var (
-	log                     = ctrl.Log.WithName(ControllerName)
-	errGroupDiscoveryFailed *discovery.ErrGroupDiscoveryFailed
+	log                        = ctrl.Log.WithName(ControllerName)
+	errResourceDiscoveryFailed *apiutil.ErrResourceDiscoveryFailed
 )
 
 //+kubebuilder:rbac:groups=policy.open-cluster-management.io,resources=*,verbs=get;list;watch;create;update;patch;delete
@@ -1004,7 +1005,7 @@ func (r *PolicyReconciler) cleanUpExcessTemplates(
 					namespaced: false,
 				})
 			}
-		} else if errors.As(err, &errGroupDiscoveryFailed) {
+		} else if errors.As(err, &errResourceDiscoveryFailed) {
 			// If there's no v1 ConstraintTemplate, try the v1beta1 version
 			gkConstraintTemplateListv1beta1 := gktemplatesv1beta1.ConstraintTemplateList{}
 			err := r.List(ctx, &gkConstraintTemplateListv1beta1, &client.ListOptions{})
@@ -1035,7 +1036,7 @@ func (r *PolicyReconciler) cleanUpExcessTemplates(
 					})
 				}
 				// Log and ignore other errors to allow cleanup to continue since Gatekeeper may not be installed
-			} else if errors.As(err, &errGroupDiscoveryFailed) {
+			} else if errors.As(err, &errResourceDiscoveryFailed) {
 				reqLogger.Info("The ConstraintTemplate CRD is not installed")
 				r.setCreatedGkConstraint(false)
 			} else {
@@ -1068,7 +1069,7 @@ func (r *PolicyReconciler) cleanUpExcessTemplates(
 				})
 			}
 		}
-	} else if errors.As(err, &errGroupDiscoveryFailed) {
+	} else if errors.As(err, &errResourceDiscoveryFailed) {
 		crdsv1beta1 := extensionsv1beta1.CustomResourceDefinitionList{}
 		err := r.List(ctx, &crdsv1beta1, &crdQuery)
 		if err != nil {
@@ -1477,7 +1478,7 @@ func (r *PolicyReconciler) hasPolicyTemplateLabel(
 	err := r.Get(ctx, crdName, &crd)
 	if err == nil {
 		return crd.GetLabels()[utils.PolicyTypeLabel] == "template", nil
-	} else if errors.As(err, &errGroupDiscoveryFailed) {
+	} else if errors.As(err, &errResourceDiscoveryFailed) {
 		betaCrd := extensionsv1beta1.CustomResourceDefinition{}
 
 		err = r.Get(ctx, crdName, &betaCrd)