Remove turbopack unbundled/register/loader (#30756)

The unbundled form is just a way to show case a prototype for how an
unbundled version of RSC can work. It's not really intended for every
bundler combination to provide such a configuration.

There's no configuration of Turbopack that supports this mode atm and
possibly never will be since it's more of an integrated server/client
experience.

This removes the unbundled form and node register/loaders from the
turbopack build.

Author: sebmarkbage

packages/react-client/src/forks/ReactFlightClientConfig.dom-node-turbopack-bundled.js

@@ -9,7 +9,8 @@
 
 export * from 'react-client/src/ReactFlightClientStreamConfigNode';
 export * from 'react-client/src/ReactClientConsoleConfigServer';
-export * from 'react-server-dom-turbopack/src/client/ReactFlightClientConfigBundlerNode';
+export * from 'react-server-dom-turbopack/src/client/ReactFlightClientConfigBundlerTurbopack';
+export * from 'react-server-dom-turbopack/src/client/ReactFlightClientConfigBundlerTurbopackServer';
 export * from 'react-server-dom-turbopack/src/client/ReactFlightClientConfigTargetTurbopackServer';
 export * from 'react-dom-bindings/src/shared/ReactFlightClientConfigDOM';
 export const usedWithSSR = true;