Update k8s dependency version to 1.21

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

vendor/k8s.io/component-base/metrics/registry.go

@@ -30,10 +30,12 @@ import (
 )
 
 var (
-	showHiddenOnce sync.Once
-	showHidden     atomic.Value
-	registries     []*kubeRegistry // stores all registries created by NewKubeRegistry()
-	registriesLock sync.RWMutex
+	showHiddenOnce      sync.Once
+	disabledMetricsLock sync.RWMutex
+	showHidden          atomic.Value
+	registries          []*kubeRegistry // stores all registries created by NewKubeRegistry()
+	registriesLock      sync.RWMutex
+	disabledMetrics     = map[string]struct{}{}
 )
 
 // shouldHide be used to check if a specific metric with deprecated version should be hidden
@@ -61,6 +63,12 @@ func ValidateShowHiddenMetricsVersion(v string) []error {
 	return nil
 }
 
+func SetDisabledMetric(name string) {
+	disabledMetricsLock.Lock()
+	defer disabledMetricsLock.Unlock()
+	disabledMetrics[name] = struct{}{}
+}
+
 // SetShowHidden will enable showing hidden metrics. This will no-opt
 // after the initial call
 func SetShowHidden() {