rebase: update kubernetes to latest

updating the kubernetes release to the
latest in main go.mod

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/k8s.io/client-go/features/envvar.go

@@ -47,6 +47,10 @@ var _ Gates = &envVarFeatureGates{}
 //
 // Please note that environmental variables can only be set to the boolean value.
 // Incorrect values will be ignored and logged.
+//
+// Features can also be set directly via the Set method.
+// In that case, these features take precedence over
+// features set via environmental variables.
 func newEnvVarFeatureGates(features map[Feature]FeatureSpec) *envVarFeatureGates {
 	known := map[Feature]FeatureSpec{}
 	for name, spec := range features {
@@ -57,7 +61,8 @@ func newEnvVarFeatureGates(features map[Feature]FeatureSpec) *envVarFeatureGates
 		callSiteName: naming.GetNameFromCallsite(internalPackages...),
 		known:        known,
 	}
-	fg.enabled.Store(map[Feature]bool{})
+	fg.enabledViaEnvVar.Store(map[Feature]bool{})
+	fg.enabledViaSetMethod = map[Feature]bool{}
 
 	return fg
 }
@@ -74,17 +79,34 @@ type envVarFeatureGates struct {
 	// known holds known feature gates
 	known map[Feature]FeatureSpec
 
-	// enabled holds a map[Feature]bool
+	// enabledViaEnvVar holds a map[Feature]bool
 	// with values explicitly set via env var
-	enabled atomic.Value
+	enabledViaEnvVar atomic.Value
+
+	// lockEnabledViaSetMethod protects enabledViaSetMethod
+	lockEnabledViaSetMethod sync.RWMutex
+
+	// enabledViaSetMethod holds values explicitly set
+	// via Set method, features stored in this map take
+	// precedence over features stored in enabledViaEnvVar
+	enabledViaSetMethod map[Feature]bool
 
 	// readEnvVars holds the boolean value which
 	// indicates whether readEnvVarsOnce has been called.
 	readEnvVars atomic.Bool
 }
 
-// Enabled returns true if the key is enabled.  If the key is not known, this call will panic.
+// Enabled returns true if the key is enabled. If the key is not known, this call will panic.
 func (f *envVarFeatureGates) Enabled(key Feature) bool {
+	if v, ok := f.wasFeatureEnabledViaSetMethod(key); ok {
+		// ensue that the state of all known features
+		// is loaded from environment variables
+		// on the first call to Enabled method.
+		if !f.hasAlreadyReadEnvVar() {
+			_ = f.getEnabledMapFromEnvVar()
+		}
+		return v
+	}
 	if v, ok := f.getEnabledMapFromEnvVar()[key]; ok {
 		return v
 	}
@@ -94,6 +116,26 @@ func (f *envVarFeatureGates) Enabled(key Feature) bool {
 	panic(fmt.Errorf("feature %q is not registered in FeatureGates %q", key, f.callSiteName))
 }
 
+// Set sets the given feature to the given value.
+//
+// Features set via this method take precedence over
+// the features set via environment variables.
+func (f *envVarFeatureGates) Set(featureName Feature, featureValue bool) error {
+	feature, ok := f.known[featureName]
+	if !ok {
+		return fmt.Errorf("feature %q is not registered in FeatureGates %q", featureName, f.callSiteName)
+	}
+	if feature.LockToDefault && feature.Default != featureValue {
+		return fmt.Errorf("cannot set feature gate %q to %v, feature is locked to %v", featureName, featureValue, feature.Default)
+	}
+
+	f.lockEnabledViaSetMethod.Lock()
+	defer f.lockEnabledViaSetMethod.Unlock()
+	f.enabledViaSetMethod[featureName] = featureValue
+
+	return nil
+}
+
 // getEnabledMapFromEnvVar will fill the enabled map on the first call.
 // This is the only time a known feature can be set to a value
 // read from the corresponding environmental variable.
@@ -119,7 +161,7 @@ func (f *envVarFeatureGates) getEnabledMapFromEnvVar() map[Feature]bool {
 				featureGatesState[feature] = boolVal
 			}
 		}
-		f.enabled.Store(featureGatesState)
+		f.enabledViaEnvVar.Store(featureGatesState)
 		f.readEnvVars.Store(true)
 
 		for feature, featureSpec := range f.known {
@@ -130,7 +172,15 @@ func (f *envVarFeatureGates) getEnabledMapFromEnvVar() map[Feature]bool {
 			klog.V(1).InfoS("Feature gate default state", "feature", feature, "enabled", featureSpec.Default)
 		}
 	})
-	return f.enabled.Load().(map[Feature]bool)
+	return f.enabledViaEnvVar.Load().(map[Feature]bool)
+}
+
+func (f *envVarFeatureGates) wasFeatureEnabledViaSetMethod(key Feature) (bool, bool) {
+	f.lockEnabledViaSetMethod.RLock()
+	defer f.lockEnabledViaSetMethod.RUnlock()
+
+	value, found := f.enabledViaSetMethod[key]
+	return value, found
 }
 
 func (f *envVarFeatureGates) hasAlreadyReadEnvVar() bool {