Consider parametrizing reconcilers to allow wrapping them with custom behaviour

[pmalek]

Problem statement

Currently, reconcilers pass themselves to controller.New() through controller.Options, e.g.

kubernetes-ingress-controller/internal/controllers/gateway/gateway_controller.go

Lines 90 to 97 in ba4a242

	// generate the controller object and attach it to the manager and link the reconciler object
	c, err := controller.New("gateway-controller", mgr, controller.Options{
	Reconciler: r,
	LogConstructor: func(_ *reconcile.Request) logr.Logger {
	return r.Log
	},
	CacheSyncTimeout: r.CacheSyncTimeout,
	})

This makes it impossible to customize their behaviour, e.g. by counting the number of calls as it was suggested in https://github.com/Kong/kubernetes-ingress-controller/pull/4172/files#r1231167031

This issue tracks the effort to consider and research options to make the reconciler passed to e.g. SetupWithManager() (or other method) customizable so that it could be wrapped to customize its behavior.