rebase: bump sigs.k8s.io/controller-runtime

Bumps the k8s-dependencies group with 1 update: [sigs.k8s.io/controller-runtime](https://github.com/kubernetes-sigs/controller-runtime).


Updates `sigs.k8s.io/controller-runtime` from 0.20.4 to 0.21.0
- [Release notes](https://github.com/kubernetes-sigs/controller-runtime/releases)
- [Changelog](https://github.com/kubernetes-sigs/controller-runtime/blob/main/RELEASE.md)
- [Commits](https://github.com/kubernetes-sigs/controller-runtime/compare/v0.20.4...v0.21.0)

---
updated-dependencies:
- dependency-name: sigs.k8s.io/controller-runtime
  dependency-version: 0.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: k8s-dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/sigs.k8s.io/controller-runtime/pkg/client/client.go

@@ -74,8 +74,8 @@ type NewClientFunc func(config *rest.Config, options Options) (Client, error)
 // New returns a new Client using the provided config and Options.
 //
 // By default, the client surfaces warnings returned by the server. To
-// suppress warnings, set config.WarningHandler = rest.NoWarnings{}. To
-// define custom behavior, implement the rest.WarningHandler interface.
+// suppress warnings, set config.WarningHandlerWithContext = rest.NoWarnings{}. To
+// define custom behavior, implement the rest.WarningHandlerWithContext interface.
 // See [sigs.k8s.io/controller-runtime/pkg/log.KubeAPIWarningLogger] for
 // an example.
 //
@@ -112,10 +112,9 @@ func newClient(config *rest.Config, options Options) (*client, error) {
 		config.UserAgent = rest.DefaultKubernetesUserAgent()
 	}
 
-	if config.WarningHandler == nil {
+	if config.WarningHandler == nil && config.WarningHandlerWithContext == nil {
 		// By default, we surface warnings.
-		config.WarningHandler = log.NewKubeAPIWarningLogger(
-			log.Log.WithName("KubeAPIWarningLogger"),
+		config.WarningHandlerWithContext = log.NewKubeAPIWarningLogger(
 			log.KubeAPIWarningLoggerOptions{
 				Deduplicate: false,
 			},