typesafe stubbing of graphQL requests for integration tests

Created by: twop

done:

• wrote a script that extracts all gql operations into a separate typescript file that has an interface that describes all operations as functions with input and output
• made all graphlql operations having unique names
• add npm script to generate these interfaces for web and shared (one per tsconfig.json). For now it needs to be run manually.
• fixed an error that was in ts-graphql-plugin related to nested list syntax [[Int!]!]
• made overrideGraphQL calls and waitForGraphQLRequest fully typesafe and now it supports autocomplete
• refactored our existing tests accordingly