Using `Effect.fnUntraced` with `RpcMiddleware.layerClient` vs. `RpcGroup` Compatibility Issues
RpcMiddleware.layerClient can take an Effect.fnUntraced(function* ({ request }) { ... } as the second argument instead of () => Effect.gen(function* () {}).It does not work with
RpcGroup's toLayerHandler, the type of the arguments of Effect.fnUntraced is any.
