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/handler/enqueue_mapped.go

@@ -86,9 +86,8 @@ func (e *enqueueRequestsFromMapFunc[object, request]) Create(
 	reqs := map[request]empty{}
 
 	var lowPriority bool
-	if e.objectImplementsClientObject && isPriorityQueue(q) && !isNil(evt.Object) {
-		clientObjectEvent := event.CreateEvent{Object: any(evt.Object).(client.Object)}
-		if isObjectUnchanged(clientObjectEvent) {
+	if isPriorityQueue(q) && !isNil(evt.Object) {
+		if evt.IsInInitialList {
 			lowPriority = true
 		}
 	}