Unhook WebSocket (#82931)
Currently, the WebSocket that's used for `next dev` is created in a React hook inside of the `HotReload` component, which is (transitively) rendered by the `ServerRoot` component, but only after the initial RSC response is processed, at least partially.
This creates a problem when integrating React's debug channel, because the root model of the RSC payload will be blocked until the associated debug info has been received through the debug channel. Since we will be using the existing WebSocket connection for the debug channel, we need to establish it before the `ServerRoot` component is rendered to avoid a deadlock.
The next-devtools dispatcher does queue events before React has provided the `dispatch` function in `DevOverlayRoot`. So creating the WebSocket outside of rendering is already supported in that regard.
closes NAR-323
