Replace the provider type predicate in the admission webhook with the…

… object label selector

pkg/admission/validator/webhook.go

@@ -4,15 +4,15 @@
 package validator
 
 import (
-	extensionspredicate "github.com/gardener/gardener/extensions/pkg/predicate"
 	extensionswebhook "github.com/gardener/gardener/extensions/pkg/webhook"
 	"github.com/gardener/gardener/pkg/apis/core"
+	"github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
 	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"sigs.k8s.io/controller-runtime/pkg/log"
 	"sigs.k8s.io/controller-runtime/pkg/manager"
-	"sigs.k8s.io/controller-runtime/pkg/predicate"
 
-	ironcore "github.com/ironcore-dev/gardener-extension-provider-ironcore/pkg/ironcore"
+	"github.com/ironcore-dev/gardener-extension-provider-ironcore/pkg/ironcore"
 )
 
 const (
@@ -29,14 +29,17 @@ func New(mgr manager.Manager) (*extensionswebhook.Webhook, error) {
 	logger.Info("Setting up webhook", "name", Name)
 
 	return extensionswebhook.New(mgr, extensionswebhook.Args{
-		Provider:   ironcore.Type,
-		Name:       Name,
-		Path:       "/webhooks/validate",
-		Predicates: []predicate.Predicate{extensionspredicate.GardenCoreProviderType(ironcore.Type)},
+		Provider: ironcore.Type,
+		Name:     Name,
+		Path:     "/webhooks/validate",
 		Validators: map[extensionswebhook.Validator][]extensionswebhook.Type{
 			NewShootValidator(mgr):         {{Obj: &core.Shoot{}}},
 			NewSecretBindingValidator(mgr): {{Obj: &core.SecretBinding{}}},
 		},
+		Target: extensionswebhook.TargetSeed,
+		ObjectSelector: &metav1.LabelSelector{
+			MatchLabels: map[string]string{constants.LabelExtensionProviderTypePrefix + ironcore.Type: "true"},
+		},
 	})
 }