[DevTools] Fix React Compiler badging

In #31140 we switched over the uMC polyfill to use memo instead of state since memo would FastRefresh properly. However this busted devtools' badging of compiled components; this PR fixes it.

TODO: tests

Author: poteto

packages/react-devtools-shared/src/backend/fiber/renderer.js

@@ -599,7 +599,8 @@ export function getInternalReactConstants(version: string): {
       !shouldSkipForgetCheck &&
       // $FlowFixMe[incompatible-type] fiber.updateQueue is mixed
       (fiber.updateQueue?.memoCache != null ||
-        fiber.memoizedState?.memoizedState?.[REACT_MEMO_CACHE_SENTINEL])
+        (Array.isArray(fiber.memoizedState) &&
+          fiber.memoizedState[0]?.[REACT_MEMO_CACHE_SENTINEL]))
     ) {
       const displayNameWithoutForgetWrapper = getDisplayNameForFiber(
         fiber,