fix: added default client errorPolicy check to onError hook

[NataliaTepluhina]

As described in #1316, currently onResult hook is triggered on query error if no errorPolicy is specified in query options. Setting errorPolicy to none in the Apollo Client defaultOptions doesn't have any effect - even if we set it to none explicitly, we still can see onResult hook triggered (here is a sandbox which reproduces this bug)

This PR attempts to fix two issues:

1. If errorPolicy is undefined for both client and query options, we default it to none to be consistent with Apollo Client defaults.
2. If errorPolicy is not defined in query options, we also check client defaultOptions for it.

Close #1316