Update k8s dependency version to 1.21

Signed-off-by: xinyanwu409 <wxinyan@vmware>

vendor/k8s.io/apimachinery/pkg/labels/labels.go

@@ -20,6 +20,8 @@ import (
 	"fmt"
 	"sort"
 	"strings"
+
+	"k8s.io/apimachinery/pkg/util/validation/field"
 )
 
 // Labels allows you to present labels independently from their storage.
@@ -79,7 +81,7 @@ func (ls Set) AsSelectorPreValidated() Selector {
 	return SelectorFromValidatedSet(ls)
 }
 
-// FormatLabels convert label map into plain string
+// FormatLabels converts label map into plain string
 func FormatLabels(labelMap map[string]string) string {
 	l := Set(labelMap).String()
 	if l == "" {
@@ -143,7 +145,7 @@ func Equals(labels1, labels2 Set) bool {
 
 // ConvertSelectorToLabelsMap converts selector string to labels map
 // and validates keys and values
-func ConvertSelectorToLabelsMap(selector string) (Set, error) {
+func ConvertSelectorToLabelsMap(selector string, opts ...field.PathOption) (Set, error) {
 	labelsMap := Set{}
 
 	if len(selector) == 0 {
@@ -157,11 +159,11 @@ func ConvertSelectorToLabelsMap(selector string) (Set, error) {
 			return labelsMap, fmt.Errorf("invalid selector: %s", l)
 		}
 		key := strings.TrimSpace(l[0])
-		if err := validateLabelKey(key); err != nil {
+		if err := validateLabelKey(key, field.ToPath(opts...)); err != nil {
 			return labelsMap, err
 		}
 		value := strings.TrimSpace(l[1])
-		if err := validateLabelValue(key, value); err != nil {
+		if err := validateLabelValue(key, value, field.ToPath(opts...)); err != nil {
 			return labelsMap, err
 		}
 		labelsMap[key] = value