Merge pull request #53631 from dixudx/enforce_cobra_required_flags

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>.

update vendor spf13/cobra to enforce required flags

**What this PR does / why we need it**:

spf13/cobra#502 has enforced checking flags that marked as required, an error will be raised if unset.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*:fixes #54855
xref #48400
fixes kubernetes/kubectl#121 

**Special notes for your reviewer**:
/assign @liggitt @eparis 

**Release note**:

```release-note
kubectl now enforces required flags at a more fundamental level
```

pkg/kubectl/cmd/drain.go

@@ -105,7 +105,8 @@ func NewCmdCordon(f cmdutil.Factory, out io.Writer) *cobra.Command {
 	options := &DrainOptions{Factory: f, Out: out}
 
 	cmd := &cobra.Command{
-		Use:     "cordon NODE",
+		Use: "cordon NODE",
+		DisableFlagsInUseLine: true,
 		Short:   i18n.T("Mark node as unschedulable"),
 		Long:    cordon_long,
 		Example: cordon_example,
@@ -132,7 +133,8 @@ func NewCmdUncordon(f cmdutil.Factory, out io.Writer) *cobra.Command {
 	options := &DrainOptions{Factory: f, Out: out}
 
 	cmd := &cobra.Command{
-		Use:     "uncordon NODE",
+		Use: "uncordon NODE",
+		DisableFlagsInUseLine: true,
 		Short:   i18n.T("Mark node as schedulable"),
 		Long:    uncordon_long,
 		Example: uncordon_example,
@@ -184,7 +186,8 @@ func NewCmdDrain(f cmdutil.Factory, out, errOut io.Writer) *cobra.Command {
 	options := &DrainOptions{Factory: f, Out: out, ErrOut: errOut, backOff: clockwork.NewRealClock()}
 
 	cmd := &cobra.Command{
-		Use:     "drain NODE",
+		Use: "drain NODE",
+		DisableFlagsInUseLine: true,
 		Short:   i18n.T("Drain node in preparation for maintenance"),
 		Long:    drain_long,
 		Example: drain_example,