)

Similar to
https://github.com/gardener/gardener/blob/90d1a8264468b1e3aca1a5afe33b8e6d344e94ea/pkg/component/etcd/etcd/crd.go#L70
and other places.

This is because the REST mapper might operate on stale data, i.e., when
a CRD it once discovered got deleted and it tries to list it again, the
result is a "404 Not Found" error instead of the expected "no match"
error.

Without this, the reconciler might fail:

```
{"level":"error","ts":"2025-03-19T13:00:04.820Z","msg":"Reconciler error","controller":"garbage-collector","namespace":"","name":"","reconcileID":"8dd07cc5-eec4-402b-ba0c-ccd5688fdce9","error":"Timeout: failed waiting for *v1.PartialObjectMetadata Informer to sync","stacktrace":"sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller[...]).reconcileHandler\n\t/go/pkg/mod/sigs.k8s.io/controller-runtime@v0.20.2/pkg/internal/controller/controller.go:341\nsigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller[...]).processNextWorkItem\n\t/go/pkg/mod/sigs.k8s.io/controller-runtime@v0.20.2/pkg/internal/controller/controller.go:288\nsigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller[...]).Start.func2.2\n\t/go/pkg/mod/sigs.k8s.io/controller-runtime@v0.20.2/pkg/internal/controller/controller.go:249"}
{"level":"error","ts":"2025-03-19T12:57:06.871Z","msg":"Unhandled Error","logger":"UnhandledError","error":"pkg/mod/k8s.io/client-go@v0.32.2/tools/cache/reflector.go:251: Failed to watch *v1.PartialObjectMetadata: failed to list *v1.PartialObjectMetadata: the server could not find the requested resource","stacktrace":"k8s.io/client-go/tools/cache.DefaultWatchErrorHandler\n\t/go/pkg/mod/k8s.io/client-go@v0.32.2/tools/cache/reflector.go:166\nk8s.io/client-go/tools/cache.(*Reflector).Run.func1\n\t/go/pkg/mod/k8s.io/client-go@v0.32.2/tools/cache/reflector.go:316\nk8s.io/apimachinery/pkg/util/wait.BackoffUntil.func1\n\t/go/pkg/mod/k8s.io/apimachinery@v0.32.2/pkg/util/wait/backoff.go:226\nk8s.io/apimachinery/pkg/util/wait.BackoffUntil\n\t/go/pkg/mod/k8s.io/apimachinery@v0.32.2/pkg/util/wait/backoff.go:227\nk8s.io/client-go/tools/cache.(*Reflector).Run\n\t/go/pkg/mod/k8s.io/client-go@v0.32.2/tools/cache/reflector.go:314\nk8s.io/client-go/tools/cache.(*controller).Run.(*Group).StartWithChannel.func2\n\t/go/pkg/mod/k8s.io/apimachinery@v0.32.2/pkg/util/wait/wait.go:55\nk8s.io/apimachinery/pkg/util/wait.(*Group).Start.func1\n\t/go/pkg/mod/k8s.io/apimachinery@v0.32.2/pkg/util/wait/wait.go:72"}
{"level":"info","ts":"2025-03-19T12:57:07.847Z","msg":"pkg/mod/k8s.io/client-go@v0.32.2/tools/cache/reflector.go:251: failed to list *v1.PartialObjectMetadata: the server could not find the requested resource"}
```

Co-authored-by: rfranzke <rafael.franzke@sap.com>