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 [0f1856c](0f1856c)

Author: acdlite

compiled/facebook-www/REVISION

@@ -1 +1 @@
-3c7667a694face1827356a7c90ee6f86a9c0baa0
+0f1856c49febe96923e469f98c0b123130ea015c

compiled/facebook-www/REVISION_TRANSFORMS

@@ -1 +1 @@
-3c7667a694face1827356a7c90ee6f86a9c0baa0
+0f1856c49febe96923e469f98c0b123130ea015c

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

@@ -2000,7 +2000,7 @@ __DEV__ &&
     exports.useTransition = function () {
       return resolveDispatcher().useTransition();
     };
-    exports.version = "19.0.0-www-classic-3c7667a6-20240925";
+    exports.version = "19.0.0-www-classic-0f1856c4-20240925";
     "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
       "function" ===
         typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&

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

@@ -1980,7 +1980,7 @@ __DEV__ &&
     exports.useTransition = function () {
       return resolveDispatcher().useTransition();
     };
-    exports.version = "19.0.0-www-modern-3c7667a6-20240925";
+    exports.version = "19.0.0-www-modern-0f1856c4-20240925";
     "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
       "function" ===
         typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&

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

@@ -665,4 +665,4 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactSharedInternals.H.useTransition();
 };
-exports.version = "19.0.0-www-classic-3c7667a6-20240925";
+exports.version = "19.0.0-www-classic-0f1856c4-20240925";

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

@@ -665,4 +665,4 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactSharedInternals.H.useTransition();
 };
-exports.version = "19.0.0-www-modern-3c7667a6-20240925";
+exports.version = "19.0.0-www-modern-0f1856c4-20240925";

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

@@ -669,7 +669,7 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactSharedInternals.H.useTransition();
 };
-exports.version = "19.0.0-www-classic-3c7667a6-20240925";
+exports.version = "19.0.0-www-classic-0f1856c4-20240925";
 "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
   "function" ===
     typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&

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

@@ -669,7 +669,7 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactSharedInternals.H.useTransition();
 };
-exports.version = "19.0.0-www-modern-3c7667a6-20240925";
+exports.version = "19.0.0-www-modern-0f1856c4-20240925";
 "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
   "function" ===
     typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&