Merge pull request #53984 from sttts/sttts-legacyscheme

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

pkg/api: extract Scheme/Registry/Codecs into pkg/api/legacyscheme

This serves as

- a preparation for the pkg/api->pkg/apis/core move
- and makes the dependency to the scheme explicit when vizualizing
  left depenncies.

The later helps with our our efforts to split up the monolithic repo
into self-contained sub-repos, e.g. for kubectl, controller-manager
and kube-apiserver in the future.

pkg/controller/deployment/BUILD

@@ -59,8 +59,8 @@ go_test(
     importpath = "k8s.io/kubernetes/pkg/controller/deployment",
     library = ":go_default_library",
     deps = [
-        "//pkg/api:go_default_library",
         "//pkg/api/install:go_default_library",
+        "//pkg/api/legacyscheme:go_default_library",
         "//pkg/apis/apps/install:go_default_library",
         "//pkg/apis/authentication/install:go_default_library",
         "//pkg/apis/authorization/install:go_default_library",

pkg/controller/deployment/deployment_controller_test.go

@@ -31,8 +31,8 @@ import (
 	"k8s.io/client-go/kubernetes/fake"
 	core "k8s.io/client-go/testing"
 	"k8s.io/client-go/tools/record"
-	"k8s.io/kubernetes/pkg/api"
 	_ "k8s.io/kubernetes/pkg/api/install"
+	"k8s.io/kubernetes/pkg/api/legacyscheme"
 	_ "k8s.io/kubernetes/pkg/apis/apps/install"
 	_ "k8s.io/kubernetes/pkg/apis/authentication/install"
 	_ "k8s.io/kubernetes/pkg/apis/authorization/install"
@@ -78,7 +78,7 @@ func newRSWithStatus(name string, specReplicas, statusReplicas int, selector map
 
 func newDeployment(name string, replicas int, revisionHistoryLimit *int32, maxSurge, maxUnavailable *intstr.IntOrString, selector map[string]string) *extensions.Deployment {
 	d := extensions.Deployment{
-		TypeMeta: metav1.TypeMeta{APIVersion: api.Registry.GroupOrDie(extensions.GroupName).GroupVersion.String()},
+		TypeMeta: metav1.TypeMeta{APIVersion: legacyscheme.Registry.GroupOrDie(extensions.GroupName).GroupVersion.String()},
 		ObjectMeta: metav1.ObjectMeta{
 			UID:         uuid.NewUUID(),
 			Name:        name,