test/e2e: set logger

Author: sbueringer

docs/book/src/developer/providers/migrations/v1.4-to-v1.5.md

@@ -53,5 +53,6 @@ for Cluster API providers. For the full list of changes please see the controlle
 * Some wait utils in `k8s.io/apimachinery/pkg/util/wait` have been deprecated. The migration is relatively straightforward except that passing in `0` 
   as a timeout in `wait.PollUntilContextTimeout` is treated as a timeout with 0 seconds, in `wait.PollImmediateWithContext` it is interpreted as infinity.
 * The fake client has been improved to handle status properly. In tests that write the CRD status, the CRDs should be added to the fake client via `WithStatusSubresource`.
+* Ensure that the e2e test suite is setting a logger (e.g. via `ctrl.SetLogger(klog.Background())` in `TestE2E`. Otherwise logs are not visible and controller-runtime will print a warning. 
 
 For reference, please see the [Bump to CR v0.15 PR](https://github.com/kubernetes-sigs/cluster-api/pull/8007) in core Cluster API.

test/e2e/e2e_suite_test.go

@@ -32,6 +32,7 @@ import (
 	. "github.com/onsi/gomega"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/klog/v2"
 	ctrl "sigs.k8s.io/controller-runtime"
 
 	clusterv1 "sigs.k8s.io/cluster-api/api/v1beta1"
@@ -98,6 +99,8 @@ func init() {
 func TestE2E(t *testing.T) {
 	g := NewWithT(t)
 
+	ctrl.SetLogger(klog.Background())
+
 	// If running in prow, make sure to use the artifacts folder that will be reported in test grid (ignoring the value provided by flag).
 	if prowArtifactFolder, exists := os.LookupEnv("ARTIFACTS"); exists {
 		artifactFolder = prowArtifactFolder