e2e labels: ensure that the lists remain sorted

Adding new entries at the bottom is tempting, but increases the risk of merge
conflicts between unrelated PRs. Let's use alphabetic order instead.

test/e2e/environment/environment.go

@@ -23,8 +23,12 @@ import (
 )
 
 var (
+	// Please keep the list in alphabetical order.
+
 	// The test does not work in UserNS (for example, `open /proc/sys/kernel/shm_rmid_forced: permission denied`).
 	NotInUserNS = framework.WithEnvironment(framework.ValidEnvironments.Add("NotInUserNS"))
+
+	// Please keep the list in alphabetical order.
 )
 
 func init() {

test/e2e/feature/feature.go

@@ -23,6 +23,8 @@ import (
 )
 
 var (
+	// Please keep the list in alphabetical order.
+
 	APIServerIdentity                       = framework.WithFeature(framework.ValidFeatures.Add("APIServerIdentity"))
 	AppArmor                                = framework.WithFeature(framework.ValidFeatures.Add("AppArmor"))
 	BootstrapTokens                         = framework.WithFeature(framework.ValidFeatures.Add("BootstrapTokens"))
@@ -35,6 +37,7 @@ var (
 	ClusterAutoscalerScalability5           = framework.WithFeature(framework.ValidFeatures.Add("ClusterAutoscalerScalability5"))
 	ClusterAutoscalerScalability6           = framework.WithFeature(framework.ValidFeatures.Add("ClusterAutoscalerScalability6"))
 	ClusterDowngrade                        = framework.WithFeature(framework.ValidFeatures.Add("ClusterDowngrade"))
+	ClusterScaleUpBypassScheduler           = framework.WithFeature(framework.ValidFeatures.Add("ClusterScaleUpBypassScheduler"))
 	ClusterSizeAutoscalingGpu               = framework.WithFeature(framework.ValidFeatures.Add("ClusterSizeAutoscalingGpu"))
 	ClusterSizeAutoscalingScaleDown         = framework.WithFeature(framework.ValidFeatures.Add("ClusterSizeAutoscalingScaleDown"))
 	ClusterSizeAutoscalingScaleUp           = framework.WithFeature(framework.ValidFeatures.Add("ClusterSizeAutoscalingScaleUp"))
@@ -132,7 +135,8 @@ var (
 	Windows                                 = framework.WithFeature(framework.ValidFeatures.Add("Windows"))
 	WindowsHostProcessContainers            = framework.WithFeature(framework.ValidFeatures.Add("WindowsHostProcessContainers"))
 	WindowsHyperVContainers                 = framework.WithFeature(framework.ValidFeatures.Add("WindowsHyperVContainers"))
-	ClusterScaleUpBypassScheduler           = framework.WithFeature(framework.ValidFeatures.Add("ClusterScaleUpBypassScheduler"))
+
+	// Please keep the list in alphabetical order.
 )
 
 func init() {

test/e2e/nodefeature/nodefeature.go

@@ -23,6 +23,8 @@ import (
 )
 
 var (
+	// Please keep the list in alphabetical order.
+
 	AppArmor                               = framework.WithNodeFeature(framework.ValidNodeFeatures.Add("AppArmor"))
 	CheckpointContainer                    = framework.WithNodeFeature(framework.ValidNodeFeatures.Add("CheckpointContainer"))
 	CriticalPod                            = framework.WithNodeFeature(framework.ValidNodeFeatures.Add("CriticalPod"))
@@ -49,6 +51,8 @@ var (
 	RuntimeHandler                         = framework.WithNodeFeature(framework.ValidNodeFeatures.Add("RuntimeHandler"))
 	SidecarContainers                      = framework.WithNodeFeature(framework.ValidNodeFeatures.Add("SidecarContainers"))
 	SystemNodeCriticalPod                  = framework.WithNodeFeature(framework.ValidNodeFeatures.Add("SystemNodeCriticalPod"))
+
+	// Please keep the list in alphabetical order.
 )
 
 func init() {