async registerApolloClient ?

Be really handy if `registerApolloClient` was async...here's what im trying to do

``` typescript
import { HttpLink } from "@apollo/client";
import {
NextSSRInMemoryCache,
NextSSRApolloClient,
} from "@apollo/experimental-nextjs-app-support/ssr";
import { registerApolloClient } from "@apollo/experimental-nextjs-app-support/rsc";
import { runWithAmplifyServerContext } from "../amplify/amplifyServerUtils";
import { fetchAuthSession } from "aws-amplify/auth/server";
import { cookies } from "next/headers";

export const { getClient } = registerApolloClient(async () => {
const token = await runWithAmplifyServerContext({
nextServerContext: { cookies },
operation: async (contextSpec) => {
const session = await fetchAuthSession(contextSpec);
return session.tokens?.accessToken.toString();
},
});
const httpLink = new HttpLink({
uri: "http://localhost:4000/graphql",
headers: {
Authorization: `Bearer ${token}`,
},
});

return new NextSSRApolloClient({
cache: new NextSSRInMemoryCache(),
link: httpLink,
});
});
```

all my auth its handled by aws congnito / amplify. I can get my jwts using the amplify utils, and them pass them to the API. But, its an async process, so needs to live in an async fn...

The example centers on the registerApolloClient entry point and an async AWS Amplify token lookup; start by reading how that entry point currently creates and exposes the client. Define the expected behavior for async registration and getClient, then add or update tests covering the async factory and authenticated client creation.

Written by the indexing model from the issue text.