Hooks: Errors from incremental payloads are dropped (e.g. @defer)

[azz]

Current Behaviour

When you have

1. A query rendered which has a deferred fragment. (...Foo @defer)
2. The Relay network respond initially with a partial response (sink.next(data))
3. Then finally, an error is received from the network (sink.error(error))...

There's code added here in relay-hooks that essentially ignores this error and just warns on it.

Expected Behaviour

If the incremental error payload is renderer as part of a suspended component, that component should receive the error, so its suspense error boundary can process it.

[rstrand]

This also effects a query configured to poll. The component never receives the error and it stops polling.