Use controller-runtime's ObjectReconciler to simplify code in reconcilers

[pmalek]

Problem Statement

Recent versions of controller-runtime include https://pkg.go.dev/sigs.k8s.io/controller-runtime@v0.17.2/pkg/reconcile#ObjectReconciler which allows to get rid of the ubiquitous:

func (r *Reconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
	o := new(MyType)
	if err := r.Client.Get(ctx, req.NamespacedName, o); err != nil {
		if k8serrors.IsNotFound(err) {
			return ctrl.Result{}, nil
		}
		return ctrl.Result{}, err
	}
	log.Trace(logger, "reconciling resource", o)

in favor of simpler:

func (r *Reconciler) Reconcile(ctx context.Context, o *MyType) (ctrl.Result, error) {
	log.Trace(logger, "reconciling resource", o)

Related PR: kubernetes-sigs/controller-runtime#2592

[Chever-John]

Sounds like a nice first issue, I'll give it a try over this night:)