runtime/controller: add support for detecting enqueue events while reconciling #1042
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Part of: fluxcd/flux2#5584
xref: kubernetes-sigs/controller-runtime#3334
This PR introduces a wrapper for the controller-runtime reconciler interface and for the controller builder to enhance them with the ability of detecting requeue events inside a reconciliation. This is useful for downstream controllers to cancel ongoing long-running operations and let a new reconciliation start sooner.
This has been tested in an EKS cluster with this example usage in kustomize-controller:
fluxcd/kustomize-controller#1536