[Fabric] Pass children when cloning (#27458)

## Summary

Currently when cloning nodes in Fabric, we reset a node's children on
each clone, and then repeatedly call appendChild to restore the previous
list of children (even if it was quasi-identical to before). This causes
unnecessary invalidation of the layout state in Fabric's ShadowNode data
(which in turn may require additional yoga clones) and extra JSI calls.

This PR adds a feature flag to pass in the children as part of the clone
call, so Fabric always has a complete view of the node that's being
mutated.

This feature flag requires matching changes in the react-native repo:
facebook/react-native#39817

## How did you test this change?

Unit test added demonstrates the new behaviour

```
yarn test -r www-modern ReactFabric-test
yarn test ReactFabric-test.internal
```

Tested a manual sync into React Native and verified core surfaces render
correctly.

DiffTrain build for [151e75a128d0fd436dce365335b96c5686f704d4](facebook/react@151e75a)

Author: jerrydev0927

compiled/facebook-www/REVISION

@@ -1 +1 @@
-0fba3ecf73900a1b54ed6d3b0617462ac92d2fef
+151e75a128d0fd436dce365335b96c5686f704d4

compiled/facebook-www/React-prod.classic.js

@@ -623,4 +623,4 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactCurrentDispatcher.current.useTransition();
 };
-exports.version = "18.3.0-www-classic-6920e6db";
+exports.version = "18.3.0-www-classic-b08870f0";

compiled/facebook-www/React-prod.modern.js

@@ -615,4 +615,4 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactCurrentDispatcher.current.useTransition();
 };
-exports.version = "18.3.0-www-modern-40cd18cd";
+exports.version = "18.3.0-www-modern-20e3e48a";

compiled/facebook-www/ReactART-dev.classic.js

@@ -69,7 +69,7 @@ function _assertThisInitialized(self) {
   return self;
 }
 
-var ReactVersion = "18.3.0-www-classic-dbe5a0bf";
+var ReactVersion = "18.3.0-www-classic-01513ba4";
 
 var LegacyRoot = 0;
 var ConcurrentRoot = 1;
@@ -18727,7 +18727,8 @@ function completeWork(current, workInProgress, renderLanes) {
         } else {
           getRootHostContainer();
 
-          var _instance3 = createInstance(_type2, newProps);
+          var _instance3 = createInstance(_type2, newProps); // TODO: For persistent renderers, we should pass children as part
+          // of the initial instance creation
 
           appendAllChildren(_instance3, workInProgress);
           workInProgress.stateNode = _instance3; // Certain renderers require commit-time effects for initial mount.

compiled/facebook-www/ReactART-dev.modern.js

@@ -69,7 +69,7 @@ function _assertThisInitialized(self) {
   return self;
 }
 
-var ReactVersion = "18.3.0-www-modern-55737203";
+var ReactVersion = "18.3.0-www-modern-612d960e";
 
 var LegacyRoot = 0;
 var ConcurrentRoot = 1;
@@ -18414,7 +18414,8 @@ function completeWork(current, workInProgress, renderLanes) {
         } else {
           getRootHostContainer();
 
-          var _instance3 = createInstance(_type2, newProps);
+          var _instance3 = createInstance(_type2, newProps); // TODO: For persistent renderers, we should pass children as part
+          // of the initial instance creation
 
           appendAllChildren(_instance3, workInProgress);
           workInProgress.stateNode = _instance3; // Certain renderers require commit-time effects for initial mount.

compiled/facebook-www/ReactDOM-dev.classic.js

@@ -23798,7 +23798,8 @@ function completeWork(current, workInProgress, renderLanes) {
             _rootContainerInstance,
             _currentHostContext,
             workInProgress
-          );
+          ); // TODO: For persistent renderers, we should pass children as part
+          // of the initial instance creation
 
           appendAllChildren(_instance3, workInProgress);
           workInProgress.stateNode = _instance3; // Certain renderers require commit-time effects for initial mount.
@@ -34006,7 +34007,7 @@ function createFiberRoot(
   return root;
 }
 
-var ReactVersion = "18.3.0-www-classic-994d0d3c";
+var ReactVersion = "18.3.0-www-classic-ccc48f7f";
 
 function createPortal$1(
   children,

compiled/facebook-www/ReactDOM-dev.modern.js

@@ -23670,7 +23670,8 @@ function completeWork(current, workInProgress, renderLanes) {
             _rootContainerInstance,
             _currentHostContext,
             workInProgress
-          );
+          ); // TODO: For persistent renderers, we should pass children as part
+          // of the initial instance creation
 
           appendAllChildren(_instance3, workInProgress);
           workInProgress.stateNode = _instance3; // Certain renderers require commit-time effects for initial mount.
@@ -33851,7 +33852,7 @@ function createFiberRoot(
   return root;
 }
 
-var ReactVersion = "18.3.0-www-modern-cb7c50df";
+var ReactVersion = "18.3.0-www-modern-c9ef3c38";
 
 function createPortal$1(
   children,

compiled/facebook-www/ReactDOMServer-dev.modern.js

@@ -19,7 +19,7 @@ if (__DEV__) {
 var React = require("react");
 var ReactDOM = require("react-dom");
 
-var ReactVersion = "18.3.0-www-modern-55737203";
+var ReactVersion = "18.3.0-www-modern-612d960e";
 
 // This refers to a WWW module.
 var warningWWW = require("warning");

compiled/facebook-www/ReactDOMTesting-dev.classic.js

@@ -23932,7 +23932,8 @@ function completeWork(current, workInProgress, renderLanes) {
             _rootContainerInstance,
             _currentHostContext,
             workInProgress
-          );
+          ); // TODO: For persistent renderers, we should pass children as part
+          // of the initial instance creation
 
           appendAllChildren(_instance3, workInProgress);
           workInProgress.stateNode = _instance3; // Certain renderers require commit-time effects for initial mount.
@@ -34623,7 +34624,7 @@ function createFiberRoot(
   return root;
 }
 
-var ReactVersion = "18.3.0-www-classic-2ae60193";
+var ReactVersion = "18.3.0-www-classic-a4f03e3d";
 
 function createPortal$1(
   children,

compiled/facebook-www/ReactDOMTesting-dev.modern.js

@@ -23804,7 +23804,8 @@ function completeWork(current, workInProgress, renderLanes) {
             _rootContainerInstance,
             _currentHostContext,
             workInProgress
-          );
+          ); // TODO: For persistent renderers, we should pass children as part
+          // of the initial instance creation
 
           appendAllChildren(_instance3, workInProgress);
           workInProgress.stateNode = _instance3; // Certain renderers require commit-time effects for initial mount.
@@ -34468,7 +34469,7 @@ function createFiberRoot(
   return root;
 }
 
-var ReactVersion = "18.3.0-www-modern-40cd18cd";
+var ReactVersion = "18.3.0-www-modern-20e3e48a";
 
 function createPortal$1(
   children,