Upgrade k8s.io/* to v0.26, sigs.k8s.io/controller-runtime to v0.14

[rfranzke]

How to categorize this issue?

/area open-source dev-productivity
/kind enhancement

What would you like to be added:

We should upgrade to the latest versions of our go upstream dependencies:

• sigs.k8s.io/controller-runtime@v0.14.0: https://github.com/kubernetes-sigs/controller-runtime/releases/tag/v0.14.0
• k8s.io/*@v0.26.0

Important changes / Action items

Here is a list of a few upstream changes to look out for when vendoring g/g, k/* and c-r in any of our repos (e.g. extensions). Please consider the release notes of controller-runtime@v0.14 and upwards as well for a more complete list and more details.

⚠️ breaking / most notable changes

• There is a new subresource client (https://github.com/kubernetes-sigs/controller-runtime/blob/ddcb99d6be40ce4b69d97505e4ef222eb053b14e/pkg/client/client.go#L296-L304) - let's make use of this and drop remaining usages of the client-go kubernetes clientset where possible
• Instead of configuring RecoverPanic again and again per controller, let's configure it globally: ⚠️ Allow configuring RecoverPanic for controllers globally kubernetes-sigs/controller-runtime#2093
• There is now a Not predicate which comes out-of-the-box: ✨ feat: add NOT predicate kubernetes-sigs/controller-runtime#2031. Let's drop

  gardener/pkg/controllerutils/predicate/predicate.go

  Lines 48 to 64 in 759c264

  	// Not inverts the passed predicate.
  	func Not(p predicate.Predicate) predicate.Predicate {
  	return predicate.Funcs{
  	CreateFunc: func(event event.CreateEvent) bool {
  	return !p.Create(event)
  	},
  	UpdateFunc: func(event event.UpdateEvent) bool {
  	return !p.Update(event)
  	},
  	GenericFunc: func(event event.GenericEvent) bool {
  	return !p.Generic(event)
  	},
  	DeleteFunc: func(event event.DeleteEvent) bool {
  	return !p.Delete(event)
  	},
  	}
  	}

  and use this instead.

ℹ️ other changes / good to know / for information only:

• It is now possible to add/remove event handlers on the cache during runtime: ⚠ Support registration and removal of event handler kubernetes-sigs/controller-runtime#2046
• The controller builder does not require For() anymore (ref ✨Builder: Do not require For kubernetes-sigs/controller-runtime#2091). However, this seems to be buggy with 0.14.0, ref 0.14.0 - Doesn't work without For kubernetes-sigs/controller-runtime#2101, so we cannot use it yet.
• There is a new cluster.ClientBuilderWithOptions function (✨ Add cluster.NewClientFunc with options kubernetes-sigs/controller-runtime#2054) which allows caching unstructured.Unstructured. Might be beneficial for gardener-resource-manager in the future.
• Logging on event source start-up was improved 🎉 ✨ Tidy up startup logging of kindWithCache source kubernetes-sigs/controller-runtime#2057

[shafeeqes]

"Add indexes to fake client to mimic field selectors" (kubernetes-sigs/controller-runtime#2025) is also included in v.14.0, which can probably replace

gardener/pkg/utils/test/client.go

Lines 29 to 37 in b6cb420

	// NewClientWithFieldSelectorSupport takes a fake client and a function that returns selectable fields for the type T
	// and adds support for field selectors to the client.
	// TODO(plkokanov): remove this once the controller-runtime fake client supports field selectors.
	func NewClientWithFieldSelectorSupport[T any](c client.Client, toSelectableFieldsFunc func(t *T) fields.Set) client.Client {
	return &clientWithFieldSelectorSupport[T]{
	Client: c,
	toSelectableFieldsFunc: toSelectableFieldsFunc,
	}
	}

[shafeeqes]

/assign

[shafeeqes]

The controller builder does not require For() anymore (ref kubernetes-sigs/controller-runtime#2091). However, this seems to be buggy with 0.14.0, ref kubernetes-sigs/controller-runtime#2101, so we cannot use it yet.

kubernetes-sigs/controller-runtime#2101 is fixed in kubernetes-sigs/controller-runtime#2105 and released with v0.14.1