Apollo Server sandbox explorer passes cookies locally when includeCookies is set to false
## Description
Apollo Server v4's sandbox explorer landing page has a property named `includeCookies`.
The property is documented to default to `false`.
https://github.com/apollographql/apollo-server/blob/6808c3b960cac09d759ba6f3c9b3e22fcda2d286/docs/source/api/plugin/landing-pages.mdx#includecookies

However, when executing a query in the explorer against a local service the cookies are passed to the resolvers.

## Version
@apollo/server: 4.0.2

## Version of Apollo Server that didn't happen
apollo-server-core: 2 (with playground, before the sandbox landing page)
apollo-server-core: 3 (with playground landing page)

## Expected behavior
When `includeCookies` is set to false (the default) no cookies should be passed to the resolvers, in any scenario, including a local service

## Actual behavior
Cookies are passed to the resolvers in local service mode

## Reproducing
I created another ticket in 
https://github.com/apollographql/embeddable-explorer/issues/176