fix(kubeClient): get standard client [EE-6376] (#10692)

Co-authored-by: testa113 <testa113>

api/http/handler/kubernetes/ingresses.go

@@ -2,7 +2,6 @@ package kubernetes
 
 import (
 	"net/http"
-	"strconv"
 
 	portainer "github.com/portainer/portainer/api"
 	"github.com/portainer/portainer/api/http/middlewares"
@@ -178,14 +177,9 @@ func (handler *Handler) getKubernetesIngressControllersByNamespace(w http.Respon
 		)
 	}
 
-	cli, ok := handler.KubernetesClientFactory.GetProxyKubeClient(
-		strconv.Itoa(endpointID), r.Header.Get("Authorization"),
-	)
-	if !ok {
-		return httperror.InternalServerError(
-			"Failed to lookup KubeClient",
-			nil,
-		)
+	cli, handlerErr := handler.getProxyKubeClient(r)
+	if handlerErr != nil {
+		return handlerErr
 	}
 
 	currentControllers, err := cli.GetIngressControllers()