(Land #28798) Move Current Owner (and Cache) to an Async Dispatcher (#28912)

Rebasing and landing #28798

This PR was approved already but held back to give time for the sync.
Rebased and landing here without pushing to seb's remote to avoid
possibility of lost updates

---------

Co-authored-by: Sebastian Markbage <sebastian@calyptus.eu>

DiffTrain build for commit 94eed63.

Author: gnoff

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react-test-renderer/cjs/ReactTestRenderer-dev.js

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<c3ec935f7569a8a6d52e0966b2837ffe>>
+ * @generated SignedSource<<000c06a477839c734ee52d10d49394b6>>
  */
 
 'use strict';
@@ -562,6 +562,11 @@ var PassiveMask = Passive$1 | Visibility | ChildDeletion; // Union of tags that
 
 var StaticMask = LayoutStatic | PassiveStatic | RefStatic | MaySuspendCommit;
 
+var currentOwner = null;
+function setCurrentOwner(fiber) {
+  currentOwner = fiber;
+}
+
 function getNearestMountedFiber(fiber) {
   var node = fiber;
   var nearestMounted = fiber;
@@ -605,7 +610,7 @@ function isFiberMounted(fiber) {
 }
 function isMounted(component) {
   {
-    var owner = ReactSharedInternals.owner;
+    var owner = currentOwner;
 
     if (owner !== null && owner.tag === ClassComponent) {
       var ownerFiber = owner;
@@ -11897,7 +11902,7 @@ function updateForwardRef(current, workInProgress, Component, nextProps, renderL
   }
 
   {
-    ReactSharedInternals.owner = workInProgress;
+    setCurrentOwner(workInProgress);
     setIsRendering(true);
     nextChildren = renderWithHooks(current, workInProgress, render, propsWithoutRef, ref, renderLanes);
     setIsRendering(false);
@@ -12380,7 +12385,7 @@ function updateFunctionComponent(current, workInProgress, Component, nextProps,
   }
 
   {
-    ReactSharedInternals.owner = workInProgress;
+    setCurrentOwner(workInProgress);
     setIsRendering(true);
     nextChildren = renderWithHooks(current, workInProgress, Component, nextProps, context, renderLanes);
     setIsRendering(false);
@@ -12532,7 +12537,7 @@ function finishClassComponent(current, workInProgress, Component, shouldUpdate,
   var instance = workInProgress.stateNode; // Rerender
 
   {
-    ReactSharedInternals.owner = workInProgress;
+    setCurrentOwner(workInProgress);
   }
 
   var nextChildren;
@@ -13851,7 +13856,7 @@ function updateContextConsumer(current, workInProgress, renderLanes) {
   var newChildren;
 
   {
-    ReactSharedInternals.owner = workInProgress;
+    setCurrentOwner(workInProgress);
     setIsRendering(true);
     newChildren = render(newValue);
     setIsRendering(false);
@@ -19158,10 +19163,16 @@ function getCacheForType(resourceType) {
   return cacheForType;
 }
 
-var DefaultCacheDispatcher = {
+var DefaultAsyncDispatcher = {
   getCacheForType: getCacheForType
 };
 
+{
+  DefaultAsyncDispatcher.getOwner = function () {
+    return currentOwner;
+  };
+}
+
 if (typeof Symbol === 'function' && Symbol.for) {
   var symbolFor = Symbol.for;
   symbolFor('selector.component');
@@ -20114,7 +20125,7 @@ function handleThrow(root, thrownValue) {
   resetCurrentFiber();
 
   {
-    ReactSharedInternals.owner = null;
+    setCurrentOwner(null);
   }
 
   if (thrownValue === SuspenseException) {
@@ -20270,17 +20281,17 @@ function popDispatcher(prevDispatcher) {
   ReactSharedInternals.H = prevDispatcher;
 }
 
-function pushCacheDispatcher() {
+function pushAsyncDispatcher() {
   {
-    var prevCacheDispatcher = ReactSharedInternals.C;
-    ReactSharedInternals.C = DefaultCacheDispatcher;
-    return prevCacheDispatcher;
+    var prevAsyncDispatcher = ReactSharedInternals.A;
+    ReactSharedInternals.A = DefaultAsyncDispatcher;
+    return prevAsyncDispatcher;
   }
 }
 
-function popCacheDispatcher(prevCacheDispatcher) {
+function popAsyncDispatcher(prevAsyncDispatcher) {
   {
-    ReactSharedInternals.C = prevCacheDispatcher;
+    ReactSharedInternals.A = prevAsyncDispatcher;
   }
 }
 
@@ -20338,7 +20349,7 @@ function renderRootSync(root, lanes) {
   var prevExecutionContext = executionContext;
   executionContext |= RenderContext;
   var prevDispatcher = pushDispatcher();
-  var prevCacheDispatcher = pushCacheDispatcher(); // If the root or lanes have changed, throw out the existing stack
+  var prevAsyncDispatcher = pushAsyncDispatcher(); // If the root or lanes have changed, throw out the existing stack
   // and prepare a fresh one. Otherwise we'll continue where we left off.
 
   if (workInProgressRoot !== root || workInProgressRootRenderLanes !== lanes) {
@@ -20418,7 +20429,7 @@ function renderRootSync(root, lanes) {
   resetContextDependencies();
   executionContext = prevExecutionContext;
   popDispatcher(prevDispatcher);
-  popCacheDispatcher(prevCacheDispatcher);
+  popAsyncDispatcher(prevAsyncDispatcher);
 
   if (workInProgress !== null) {
     // This is a sync render, so we should have finished the whole tree.
@@ -20451,7 +20462,7 @@ function renderRootConcurrent(root, lanes) {
   var prevExecutionContext = executionContext;
   executionContext |= RenderContext;
   var prevDispatcher = pushDispatcher();
-  var prevCacheDispatcher = pushCacheDispatcher(); // If the root or lanes have changed, throw out the existing stack
+  var prevAsyncDispatcher = pushAsyncDispatcher(); // If the root or lanes have changed, throw out the existing stack
   // and prepare a fresh one. Otherwise we'll continue where we left off.
 
   if (workInProgressRoot !== root || workInProgressRootRenderLanes !== lanes) {
@@ -20664,7 +20675,7 @@ function renderRootConcurrent(root, lanes) {
 
   resetContextDependencies();
   popDispatcher(prevDispatcher);
-  popCacheDispatcher(prevCacheDispatcher);
+  popAsyncDispatcher(prevAsyncDispatcher);
   executionContext = prevExecutionContext;
 
 
@@ -20728,7 +20739,7 @@ function performUnitOfWork(unitOfWork) {
   }
 
   {
-    ReactSharedInternals.owner = null;
+    setCurrentOwner(null);
   }
 }
 
@@ -20828,7 +20839,7 @@ function replaySuspendedUnitOfWork(unitOfWork) {
   }
 
   {
-    ReactSharedInternals.owner = null;
+    setCurrentOwner(null);
   }
 }
 
@@ -21156,7 +21167,7 @@ function commitRootImpl(root, recoverableErrors, transitions, didIncludeRenderPh
     executionContext |= CommitContext; // Reset this to null before calling lifecycles
 
     {
-      ReactSharedInternals.owner = null;
+      setCurrentOwner(null);
     } // The commit phase is broken into several sub-phases. We do a separate pass
     // of the effect list for each phase: all mutation effects come before all
     // layout effects, and so on.
@@ -22978,7 +22989,7 @@ identifierPrefix, onUncaughtError, onCaughtError, onRecoverableError, transition
   return root;
 }
 
-var ReactVersion = '19.0.0-beta-6e32de0b';
+var ReactVersion = '19.0.0-beta-fd8f46d6';
 
 /*
  * The `'' + value` pattern (used in perf-sensitive code) throws for Symbol