LocalQueryRenderer uses useLayoutEffect which warns during server-rendering

I'm using Next.js with Relay. We used `fetchQuery` to run a query in getInitialProps, which populates the store.

Until now we've used `relay-query-lookup-renderer` with `STORE_ONLY` during render to make sure all the subscriptions are set up correctly, but this breaks with 6.0. I tried switching to `LocalQueryRenderer`, which works, but warns on the server during render due to its use of `useLayoutEffect`.

Start by locating LocalQueryRenderer and the useLayoutEffect that produces the server-rendering warning, then compare its behavior with relay-query-lookup-renderer in STORE_ONLY mode. Reproduce the warning with the fetchQuery/getInitialProps setup described in the issue. Done means server rendering no longer warns while the required subscriptions remain set up correctly.

Written by the indexing model from the issue text.