[release-1.4] Removing experimental annotation from SupportedFeatures in GWC Status. (#4116)

* Removing experimental annotation from supportedFeatures in GWC Status.

* Run make generate to update generated files

---------

Co-authored-by: Beka Modebadze <[email protected]>

Author: k8s-infra-cherrypick-robot

apis/v1/gatewayclass_types.go

@@ -304,7 +304,6 @@ type GatewayClassStatus struct {
 	// +optional
 	// +listType=map
 	// +listMapKey=name
-	// <gateway:experimental>
 	// +kubebuilder:validation:MaxItems=64
 	SupportedFeatures []SupportedFeature `json:"supportedFeatures,omitempty"`
 }