refactor: separate workload class from placement driver

internal/controller/components.go

@@ -14,12 +14,12 @@ import (
 type ComponentName string
 
 const (
-	Scheduler ComponentName = "scheduler"
-	PodWorker ComponentName = "pod-worker"
-	VMWorker  ComponentName = "vm-worker"
+	Scheduler         ComponentName = "scheduler"
+	KubernetesWorker  ComponentName = "kubernetes-worker"
+	OpenSandboxWorker ComponentName = "opensandbox-worker"
 )
 
-var defaultComponents = []ComponentName{Scheduler, PodWorker, VMWorker}
+var defaultComponents = []ComponentName{Scheduler, KubernetesWorker, OpenSandboxWorker}
 
 // Selection parses --components. An empty value enables all components.
 type Selection []ComponentName
@@ -31,6 +31,12 @@ func ParseSelection(value string) (Selection, error) {
 	var selected Selection
 	for _, raw := range strings.Split(value, ",") {
 		name := ComponentName(strings.TrimSpace(raw))
+		switch name {
+		case "pod-worker":
+			name = KubernetesWorker
+		case "vm-worker":
+			name = OpenSandboxWorker
+		}
 		if !slices.Contains(defaultComponents, name) {
 			return nil, fmt.Errorf("unknown controller component %q", name)
 		}