remove enablement of alpha/beta apis for DRA

DynamicResourceAllocation is in GA with resource.k8s.io/v1 apis
in 1.34. we enabled v1beta1 api for DynamicResourceAllocation
in tech or dev preview in 4.20 and previous versions. we don't
support upgrade from a tech/dev preview cluster, so we don't
have to carry the burden of supporting alpha/beta apis.

we should not support alpha/beta apis from 4.20

Author: tkashem

pkg/operator/configobservation/apienablement/observe_runtime_config.go

@@ -28,16 +28,6 @@ var defaultGroupVersionsByFeatureGate = map[configv1.FeatureGateName][]groupVers
 		{KubeVersionRange: semver.MustParseRange(">=1.33.0 <1.35.0"), GroupVersion: schema.GroupVersion{Group: "admissionregistration.k8s.io", Version: "v1alpha1"}},
 		{KubeVersionRange: semver.MustParseRange(">=1.34.0 <1.35.0"), GroupVersion: schema.GroupVersion{Group: "admissionregistration.k8s.io", Version: "v1beta1"}},
 	},
-	"DynamicResourceAllocation": {
-		// when DRA goes GA with OpenShift 4.21 (1.34), alpha and beta
-		// apis must not be served. But for now, while 1.34 rebase is
-		// in progress, continue serving these apis.
-		// TODO: remove the following alpha/beta enablement for resource
-		// apis after the 1.34 rebase PR has successfully merges.
-		{KubeVersionRange: semver.MustParseRange(">=1.31.0 <1.35.0"), GroupVersion: schema.GroupVersion{Group: "resource.k8s.io", Version: "v1alpha3"}},
-		{KubeVersionRange: semver.MustParseRange(">=1.32.0 <1.35.0"), GroupVersion: schema.GroupVersion{Group: "resource.k8s.io", Version: "v1beta1"}},
-		{KubeVersionRange: semver.MustParseRange(">=1.33.0 <1.35.0"), GroupVersion: schema.GroupVersion{Group: "resource.k8s.io", Version: "v1beta2"}},
-	},
 	"VolumeAttributesClass": {{GroupVersion: schema.GroupVersion{Group: "storage.k8s.io", Version: "v1beta1"}}},
 }