dry-run: Promote from Alpha to Beta

Also remove the test that used to check that the dry-run flag is
forbidden.

Kubernetes-commit: 5dca8e00e6d5501480244b8fd3e8aca54830042a

pkg/endpoints/apiserver_test.go

@@ -38,7 +38,6 @@ import (
 	"time"
 
 	"github.com/emicklei/go-restful"
-
 	fuzzer "k8s.io/apimachinery/pkg/api/apitesting/fuzzer"
 	apiequality "k8s.io/apimachinery/pkg/api/equality"
 	apierrs "k8s.io/apimachinery/pkg/api/errors"
@@ -68,8 +67,11 @@ import (
 	"k8s.io/apiserver/pkg/endpoints/handlers/responsewriters"
 	"k8s.io/apiserver/pkg/endpoints/request"
 	genericapitesting "k8s.io/apiserver/pkg/endpoints/testing"
+	"k8s.io/apiserver/pkg/features"
 	"k8s.io/apiserver/pkg/registry/rest"
 	"k8s.io/apiserver/pkg/server/filters"
+	utilfeature "k8s.io/apiserver/pkg/util/feature"
+	utilfeaturetesting "k8s.io/apiserver/pkg/util/feature/testing"
 )
 
 type alwaysMutatingDeny struct{}
@@ -3865,7 +3867,9 @@ func (storage *SimpleRESTStorageWithDeleteCollection) DeleteCollection(ctx conte
 	return nil, nil
 }
 
-func TestDryRun(t *testing.T) {
+func TestDryRunDisabled(t *testing.T) {
+	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.DryRun, false)()
+
 	tests := []struct {
 		path        string
 		verb        string

pkg/features/kube_features.go

@@ -75,6 +75,7 @@ const (
 
 	// owner: @apelisse
 	// alpha: v1.12
+	// beta: v1.13
 	//
 	// Allow requests to be processed but not stored, so that
 	// validation, merging, mutation can be tested without
@@ -96,5 +97,5 @@ var defaultKubernetesFeatureGates = map[utilfeature.Feature]utilfeature.FeatureS
 	APIResponseCompression:  {Default: false, PreRelease: utilfeature.Alpha},
 	Initializers:            {Default: false, PreRelease: utilfeature.Alpha},
 	APIListChunking:         {Default: true, PreRelease: utilfeature.Beta},
-	DryRun:                  {Default: false, PreRelease: utilfeature.Alpha},
+	DryRun:                  {Default: true, PreRelease: utilfeature.Beta},
 }