Merge pull request kubernetes#127492 from p0lyn0mial/upstream-deflake-consistent-read-fallback

pkg/storage/cacher/cacher_whitebox_test: deflake TestConsistentReadFallback when ResilientWatchCacheInitialization is off

Author: k8s-ci-robot

staging/src/k8s.io/apiserver/pkg/storage/cacher/cacher_whitebox_test.go

@@ -381,6 +381,11 @@ apiserver_watch_cache_consistent_read_total{fallback="true", resource="pods", su
 				t.Fatalf("Couldn't create cacher: %v", err)
 			}
 			defer cacher.Stop()
+			if !utilfeature.DefaultFeatureGate.Enabled(features.ResilientWatchCacheInitialization) {
+				if err := cacher.ready.wait(context.Background()); err != nil {
+					t.Fatalf("unexpected error waiting for the cache to be ready")
+				}
+			}
 
 			if fmt.Sprintf("%d", cacher.watchCache.resourceVersion) != tc.watchCacheRV {
 				t.Fatalf("Expected watch cache RV to equal watchCacheRV, got: %d, want: %s", cacher.watchCache.resourceVersion, tc.watchCacheRV)