Track debugInfo on module state instead of stack

Notably with DON'T use try/finally because if something throws we want
to observe what it was at the time we threw.

Now we can use this when we create the Throw Fiber to associate the
Server Components that were part of the parent stack before this error
threw.

packages/react-client/src/__tests__/ReactFlight-test.js

@@ -1050,8 +1050,10 @@ describe('ReactFlight', () => {
     }
 
     const expectedStack = __DEV__
-      ? // TODO: This should include Throw but it doesn't have a Fiber.
-        '\n    in div' + '\n    in ErrorBoundary (at **)' + '\n    in App'
+      ? '\n    in Throw' +
+        '\n    in div' +
+        '\n    in ErrorBoundary (at **)' +
+        '\n    in App'
       : '\n    in div' + '\n    in ErrorBoundary (at **)';
 
     function App() {