Merge pull request #63258 from deads2k/cli-42-simplify-buidler

Automatic merge from submit-queue (batch tested with PRs 63258, 63398, 63403). 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>.

stop using Info.Mappings when they may not be present

On a resource builder, you cannot logically have a RESTMapping or a Client if you're running a local action.  Reliance on the `info.Client` and `info.Mapping` is a bug we need to fix.  This updates the docs and eliminates unnecessary reliance.  Other hits I found didn't have `--local` options, so we're safe or had them and and were already broken.  I think we'll be able to help them after making our creation flow obvious.

@kubernetes/sig-cli-maintainers 

```release-note
NONE
```

pkg/kubectl/cmd/label.go

@@ -33,6 +33,7 @@ import (
 	"k8s.io/apimachinery/pkg/util/json"
 	"k8s.io/apimachinery/pkg/util/validation"
 
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured/unstructuredscheme"
 	"k8s.io/kubernetes/pkg/kubectl"
 	"k8s.io/kubernetes/pkg/kubectl/cmd/templates"
 	cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
@@ -329,7 +330,11 @@ func (o *LabelOptions) RunLabel() error {
 			indent := ""
 			if !one {
 				indent = " "
-				fmt.Fprintf(o.ErrOut, "Listing labels for %s.%s/%s:\n", info.Mapping.GroupVersionKind.Kind, info.Mapping.GroupVersionKind.Group, info.Name)
+				gvks, _, err := unstructuredscheme.NewUnstructuredObjectTyper().ObjectKinds(info.Object)
+				if err != nil {
+					return err
+				}
+				fmt.Fprintf(o.ErrOut, "Listing labels for %s.%s/%s:\n", gvks[0].Kind, gvks[0].Group, info.Name)
 			}
 			for k, v := range accessor.GetLabels() {
 				fmt.Fprintf(o.Out, "%s%s=%s\n", indent, k, v)