[DevTools] Use the scrollWidth/Height for the root when the root is the documentElement (facebook#34651)

If I can scroll the document due to it overflowing, I should be able to
scroll the suspense tab as much. The real rect for the root when it's
the document is really the full scroll height.

This doesn't fully eliminate the need to do recursive bounding boxes for
the root since it's still possible to have the rects overflow. E.g. if
they're currently resuspended or inside nested scrolls.

~However, maybe we should have the actual paintable root rect just be
this rectangle instead of including the recursive ones.~ Actually never
mind. The root really represents the Transition so it doesn't make sense
to give it any specific rectangle. It's rather the whole background.

DiffTrain build for [554a373](facebook@554a373)

Author: pull[bot]

compiled-rn/VERSION_NATIVE_FB

@@ -1 +1 @@
-19.3.0-native-fb-19f65ff1-20251002
+19.2.0-native-fb-554a373d-20250930

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react/react-dom/cjs/ReactDOM-dev.js

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<f1edee67b4d23a4c86822f41e87e48da>>
+ * @generated SignedSource<<42f869dc063e608ea2eea8623abd96fc>>
  */
 
 "use strict";
@@ -404,5 +404,5 @@ __DEV__ &&
     exports.useFormStatus = function () {
       return resolveDispatcher().useHostTransitionStatus();
     };
-    exports.version = "19.3.0-native-fb-19f65ff1-20251002";
+    exports.version = "19.2.0-native-fb-554a373d-20250930";
   })();

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react/react-dom/cjs/ReactDOM-prod.js

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<1f5783be843150ab0614e4b32ecb7a2f>>
+ * @generated SignedSource<<d595c3f7b8581acbc5a2096bd328c1cd>>
  */
 
 "use strict";
@@ -203,4 +203,4 @@ exports.useFormState = function (action, initialState, permalink) {
 exports.useFormStatus = function () {
   return ReactSharedInternals.H.useHostTransitionStatus();
 };
-exports.version = "19.3.0-native-fb-19f65ff1-20251002";
+exports.version = "19.2.0-native-fb-554a373d-20250930";

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react/react-dom/cjs/ReactDOM-profiling.js

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<1f5783be843150ab0614e4b32ecb7a2f>>
+ * @generated SignedSource<<d595c3f7b8581acbc5a2096bd328c1cd>>
  */
 
 "use strict";
@@ -203,4 +203,4 @@ exports.useFormState = function (action, initialState, permalink) {
 exports.useFormStatus = function () {
   return ReactSharedInternals.H.useHostTransitionStatus();
 };
-exports.version = "19.3.0-native-fb-19f65ff1-20251002";
+exports.version = "19.2.0-native-fb-554a373d-20250930";