Make prerendering always non-blocking (#31056)

When a synchronous update suspends, and we prerender the siblings, the
prerendering should be non-blocking so that we can immediately restart
once the data arrives.

This happens automatically when there's a Suspense boundary, because we
immediately commit the boundary and then proceed to a Retry render,
which are always concurrent. When there's not a Suspense boundary, there
is no Retry, so we need to take care to switch from the synchronous work
loop to the concurrent one, to enable time slicing.

DiffTrain build for commit 0f1856c.

compiled-rn/VERSION_NATIVE_FB

@@ -1 +1 @@
-19.0.0-native-fb-3c7667a6-20240925
+19.0.0-native-fb-0f1856c4-20240925

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

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<b5197c15cfc4e771615c7ad354157216>>
+ * @generated SignedSource<<abebda03294fad7cb3858d1b5d97fe36>>
  */
 
 "use strict";
@@ -420,5 +420,5 @@ __DEV__ &&
     exports.useFormStatus = function () {
       return resolveDispatcher().useHostTransitionStatus();
     };
-    exports.version = "19.0.0-native-fb-3c7667a6-20240925";
+    exports.version = "19.0.0-native-fb-0f1856c4-20240925";
   })();

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

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<547023b89ae2d39a60356535570a6d4a>>
+ * @generated SignedSource<<80a716efe68d232a2259f9d368a23144>>
  */
 
 "use strict";
@@ -203,4 +203,4 @@ exports.useFormState = function (action, initialState, permalink) {
 exports.useFormStatus = function () {
   return ReactSharedInternals.H.useHostTransitionStatus();
 };
-exports.version = "19.0.0-native-fb-3c7667a6-20240925";
+exports.version = "19.0.0-native-fb-0f1856c4-20240925";

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

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<547023b89ae2d39a60356535570a6d4a>>
+ * @generated SignedSource<<80a716efe68d232a2259f9d368a23144>>
  */
 
 "use strict";
@@ -203,4 +203,4 @@ exports.useFormState = function (action, initialState, permalink) {
 exports.useFormStatus = function () {
   return ReactSharedInternals.H.useHostTransitionStatus();
 };
-exports.version = "19.0.0-native-fb-3c7667a6-20240925";
+exports.version = "19.0.0-native-fb-0f1856c4-20240925";