subscribeToMore shouldn't try to update the cache when useQuery's fetchPolicy is set to "no-cache"

[jimmycrequer]

Intended outcome:

When setting fetchPolicy to "no-cache" in useQuery, I expect Apollo client not trying to update the cache on subscribeToMore subscription data.

Actual outcome:

Apollo Client is writing the result of the subscription data into the cache.

How to reproduce the issue:

const { data, subscribeToMore } = useQuery(MY_QUERY, {
    fetchPolicy: "no-cache",
    nextFetchPolicy: "no-cache",
});

useEffect(
    () =>
      subscribeToMore({
        document: MY_EVENT,
        updateQuery: (prev, { subscriptionData }) => {
          // do stuff

          return null; // I shouldn't need to return anything
        }
      }),
    [subscribeToMore]
  );

Versions

  System:
    OS: Windows 10 10.0.19041
  Binaries:
    Node: 15.8.0 - ~\AppData\Local\Volta\tools\image\node\15.8.0\node.EXE
    Yarn: 1.22.10 - ~\Documents\workspace\GOunite\v3\client\node_modules\.bin\yarn.CMD
    npm: 7.7.5 - ~\AppData\Local\Volta\tools\image\npm\7.7.5\bin\npm.CMD
  Browsers:
    Chrome: 89.0.4389.114
    Edge: Spartan (44.19041.423.0), Chromium (90.0.818.42)
  npmPackages:
    @apollo/client: 3.4.0-beta.23 => 3.3.15
    apollo: 2.32.5 => 2.32.5
    apollo-cache-persist: 0.1.1 => 0.1.1
    apollo-upload-client: 14.1.3 => 14.1.3