Add firstEffect, et al fields to new fork

We need to bisect the changes to the recent commit phase refactor. To
do this, we'll need to add back the effect list temporarily.

This only adds them to the Fiber type so that the memory is the same
as the old fork.

.eslintrc.js

@@ -116,12 +116,7 @@ module.exports = {
     'react-internal/no-cross-fork-types': [
       ERROR,
       {
-        old: [
-          'firstEffect',
-          'nextEffect',
-          // Disabled because it's also used by the Hook type.
-          // 'lastEffect',
-        ],
+        old: [],
         new: [],
       },
     ],
@@ -190,7 +185,7 @@ module.exports = {
     {
       files: [
         'packages/react-native-renderer/**/*.js',
-        'packages/react-transport-native-relay/**/*.js'
+        'packages/react-transport-native-relay/**/*.js',
       ],
       globals: {
         nativeFabricUIManager: true,

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

@@ -141,6 +141,10 @@ function FiberNode(
 
   // Effects
   this.flags = NoFlags;
+  this.nextEffect = null;
+
+  this.firstEffect = null;
+  this.lastEffect = null;
   this.subtreeFlags = NoFlags;
   this.deletions = null;