Enable the enableEagerAlternateStateNodeCleanup Feature Flag (#33447)

## Summary

Enables the `enableEagerAlternateStateNodeCleanup` feature flag for all
variants, while maintaining the `__VARIANT__` for the internal React
Native flavor for backtesting reasons.

## How did you test this change?

```
$ yarn test
```

DiffTrain build for [dddcae7](dddcae7)

Author: yungsters

compiled/facebook-www/REVISION

@@ -1 +1 @@
-d742611ce40545127032f4e221c78bf9f70eb437
+dddcae7a11b8241cbd6e2de55f9e68881baea458

compiled/facebook-www/REVISION_TRANSFORMS

@@ -1 +1 @@
-d742611ce40545127032f4e221c78bf9f70eb437
+dddcae7a11b8241cbd6e2de55f9e68881baea458

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

@@ -1537,7 +1537,7 @@ __DEV__ &&
     exports.useTransition = function () {
       return resolveDispatcher().useTransition();
     };
-    exports.version = "19.2.0-www-classic-d742611c-20250603";
+    exports.version = "19.2.0-www-classic-dddcae7a-20250605";
     "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
       "function" ===
         typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&

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

@@ -1537,7 +1537,7 @@ __DEV__ &&
     exports.useTransition = function () {
       return resolveDispatcher().useTransition();
     };
-    exports.version = "19.2.0-www-modern-d742611c-20250603";
+    exports.version = "19.2.0-www-modern-dddcae7a-20250605";
     "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
       "function" ===
         typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&

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

@@ -635,4 +635,4 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactSharedInternals.H.useTransition();
 };
-exports.version = "19.2.0-www-classic-d742611c-20250603";
+exports.version = "19.2.0-www-classic-dddcae7a-20250605";

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

@@ -635,4 +635,4 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactSharedInternals.H.useTransition();
 };
-exports.version = "19.2.0-www-modern-d742611c-20250603";
+exports.version = "19.2.0-www-modern-dddcae7a-20250605";

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

@@ -639,7 +639,7 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactSharedInternals.H.useTransition();
 };
-exports.version = "19.2.0-www-classic-d742611c-20250603";
+exports.version = "19.2.0-www-classic-dddcae7a-20250605";
 "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
   "function" ===
     typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&

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

@@ -639,7 +639,7 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactSharedInternals.H.useTransition();
 };
-exports.version = "19.2.0-www-modern-d742611c-20250603";
+exports.version = "19.2.0-www-modern-dddcae7a-20250605";
 "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
   "function" ===
     typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&

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

@@ -19105,10 +19105,10 @@ __DEV__ &&
     (function () {
       var internals = {
         bundleType: 1,
-        version: "19.2.0-www-classic-d742611c-20250603",
+        version: "19.2.0-www-classic-dddcae7a-20250605",
         rendererPackageName: "react-art",
         currentDispatcherRef: ReactSharedInternals,
-        reconcilerVersion: "19.2.0-www-classic-d742611c-20250603"
+        reconcilerVersion: "19.2.0-www-classic-dddcae7a-20250605"
       };
       internals.overrideHookState = overrideHookState;
       internals.overrideHookStateDeletePath = overrideHookStateDeletePath;
@@ -19142,7 +19142,7 @@ __DEV__ &&
     exports.Shape = Shape;
     exports.Surface = Surface;
     exports.Text = Text;
-    exports.version = "19.2.0-www-classic-d742611c-20250603";
+    exports.version = "19.2.0-www-classic-dddcae7a-20250605";
     "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
       "function" ===
         typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&

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

@@ -18877,10 +18877,10 @@ __DEV__ &&
     (function () {
       var internals = {
         bundleType: 1,
-        version: "19.2.0-www-modern-d742611c-20250603",
+        version: "19.2.0-www-modern-dddcae7a-20250605",
         rendererPackageName: "react-art",
         currentDispatcherRef: ReactSharedInternals,
-        reconcilerVersion: "19.2.0-www-modern-d742611c-20250603"
+        reconcilerVersion: "19.2.0-www-modern-dddcae7a-20250605"
       };
       internals.overrideHookState = overrideHookState;
       internals.overrideHookStateDeletePath = overrideHookStateDeletePath;
@@ -18914,7 +18914,7 @@ __DEV__ &&
     exports.Shape = Shape;
     exports.Surface = Surface;
     exports.Text = Text;
-    exports.version = "19.2.0-www-modern-d742611c-20250603";
+    exports.version = "19.2.0-www-modern-dddcae7a-20250605";
     "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
       "function" ===
         typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&