Update www flags (#28150)

Adds an experiment for `enableFormActions` and hardcodes
`enableCustomElementPropertySupport` on www since this is shipped.

Author: rickhanlonii

packages/shared/forks/ReactFeatureFlags.www-dynamic.js

@@ -23,9 +23,9 @@ export const enableLazyContextPropagation = __VARIANT__;
 export const forceConcurrentByDefaultForTesting = __VARIANT__;
 export const enableUnifiedSyncLane = __VARIANT__;
 export const enableTransitionTracing = __VARIANT__;
-export const enableCustomElementPropertySupport = __VARIANT__;
 export const enableDeferRootSchedulingToMicrotask = __VARIANT__;
 export const enableAsyncActions = __VARIANT__;
+export const enableFormActions = __VARIANT__;
 export const alwaysThrottleRetries = __VARIANT__;
 export const enableDO_NOT_USE_disableStrictPassiveEffect = __VARIANT__;
 export const enableUseDeferredValueInitialArg = __VARIANT__;

packages/shared/forks/ReactFeatureFlags.www.js

@@ -26,9 +26,9 @@ export const {
   enableUnifiedSyncLane,
   enableRetryLaneExpiration,
   enableTransitionTracing,
-  enableCustomElementPropertySupport,
   enableDeferRootSchedulingToMicrotask,
   enableAsyncActions,
+  enableFormActions,
   alwaysThrottleRetries,
   enableDO_NOT_USE_disableStrictPassiveEffect,
   disableSchedulerTimeoutInWorkLoop,
@@ -53,6 +53,7 @@ export const createRootStrictEffectsByDefault = false;
 export const enableSuspenseAvoidThisFallback = true;
 export const enableSuspenseAvoidThisFallbackFizz = false;
 
+export const enableCustomElementPropertySupport = true;
 export const enableCPUSuspense = true;
 export const enableFloat = true;
 export const enableUseMemoCacheHook = true;
@@ -72,8 +73,6 @@ export const enableLegacyCache = true;
 export const enableCacheElement = true;
 export const enableFetchInstrumentation = false;
 
-export const enableFormActions = false;
-
 export const enableBinaryFlight = false;
 export const enableTaint = false;