Fix flow and tests

Author: rickhanlonii

packages/react-reconciler/src/ReactFiberWorkLoop.new.js

@@ -1178,7 +1178,7 @@ export function batchedEventUpdates<A, R>(fn: A => R, a: A): R {
 }
 
 export function discreteUpdates<A, B, C, D, R>(
-  fn: (A, B, C) => R,
+  fn: (A, B, C, D) => R,
   a: A,
   b: B,
   c: C,

packages/react-reconciler/src/ReactFiberWorkLoop.old.js

@@ -1178,7 +1178,7 @@ export function batchedEventUpdates<A, R>(fn: A => R, a: A): R {
 }
 
 export function discreteUpdates<A, B, C, D, R>(
-  fn: (A, B, C) => R,
+  fn: (A, B, C, D) => R,
   a: A,
   b: B,
   c: C,
@@ -2095,6 +2095,7 @@ function commitRootImpl(root, renderPriorityLevel) {
 
 export function flushPassiveEffects(): boolean {
   // Returns whether passive effects were flushed.
+  // TODO: This depends on the scheduler priority, which is no longer updated.
   if (pendingPassiveEffectsRenderPriority !== NoSchedulerPriority) {
     const priorityLevel =
       pendingPassiveEffectsRenderPriority > NormalSchedulerPriority