fix: support WatchListClient in test ListerWatcher wrappers

k8s.io/client-go v0.35.0 defaults the WatchListClient feature gate to
true, causing reflectors to require bookmark events. The fake clientset
handles this via IsWatchListSemanticsUnSupported(), but our custom
nodeListWatch and typhaListWatch wrappers in test/utils.go did not
implement this interface, causing informers to hang on HasSynced().

Add IsWatchListSemanticsUnSupported() to both wrappers so the reflector
falls back to the traditional list+watch flow.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: pasanw

test/utils.go

@@ -165,8 +165,15 @@ func (n nodeListWatch) Watch(options metav1.ListOptions) (watch.Interface, error
 	return n.cs.CoreV1().Nodes().Watch(context.Background(), options)
 }
 
-// Mock a cache.ListWatcher for nodes to use in the test as there is no other suitable
-// mock available in the fake packages.
+// IsWatchListSemanticsUnSupported signals to the reflector that this ListerWatcher
+// does not support watch-list semantics. Without this, the reflector in client-go
+// v0.35.0+ hangs waiting for bookmark events that the fake clientset doesn't send.
+func (n nodeListWatch) IsWatchListSemanticsUnSupported() bool {
+	return true
+}
+
+// Mock a cache.ListWatcher for typha deployments to use in the test as there is no
+// other suitable mock available in the fake packages.
 // Ref: https://github.com/kubernetes/client-go/issues/352#issuecomment-614740790
 type typhaListWatch struct {
 	cs kubernetes.Interface
@@ -184,6 +191,12 @@ func (t typhaListWatch) Watch(options metav1.ListOptions) (watch.Interface, erro
 	return t.cs.AppsV1().Deployments("calico-system").Watch(context.Background(), options)
 }
 
+// IsWatchListSemanticsUnSupported signals to the reflector that this ListerWatcher
+// does not support watch-list semantics.
+func (t typhaListWatch) IsWatchListSemanticsUnSupported() bool {
+	return true
+}
+
 func CreateNode(c kubernetes.Interface, name string, labels map[string]string, annotations map[string]string) *corev1.Node {
 	node := &corev1.Node{
 		TypeMeta: metav1.TypeMeta{Kind: "Node", APIVersion: "v1"},