Update field to use feature gate

Author: vivzbansal

pkg/api/pod/util.go

@@ -386,6 +386,7 @@ func GetValidationOptionsFromPodSpecAndMeta(podSpec, oldPodSpec *api.PodSpec, po
 		AllowPodLifecycleSleepActionZeroValue:             utilfeature.DefaultFeatureGate.Enabled(features.PodLifecycleSleepActionAllowZero),
 		PodLevelResourcesEnabled:                          utilfeature.DefaultFeatureGate.Enabled(features.PodLevelResources),
 		AllowInvalidLabelValueInRequiredNodeAffinity:      false,
+		AllowSidecarResizePolicy:                          utilfeature.DefaultFeatureGate.Enabled(features.InPlacePodVerticalScaling),
 	}
 
 	// If old spec uses relaxed validation or enabled the RelaxedEnvironmentVariableValidation feature gate,
@@ -419,7 +420,7 @@ func GetValidationOptionsFromPodSpecAndMeta(podSpec, oldPodSpec *api.PodSpec, po
 
 		opts.AllowPodLifecycleSleepActionZeroValue = opts.AllowPodLifecycleSleepActionZeroValue || podLifecycleSleepActionZeroValueInUse(podSpec)
 		// If oldPod has resize policy set on the restartable init container, we must allow it
-		opts.AllowSidecarResizePolicy = hasRestartableInitContainerResizePolicy(oldPodSpec)
+		opts.AllowSidecarResizePolicy = opts.AllowSidecarResizePolicy || hasRestartableInitContainerResizePolicy(oldPodSpec)
 	}
 	if oldPodMeta != nil && !opts.AllowInvalidPodDeletionCost {
 		// This is an update, so validate only if the existing object was valid.