groupBy item in result set even when not requested

[fredcarle]

When we query with a groupBy, the groupBy item is returned in the result set even though it wasn't explicitly requested. This goes agains the graphql specs that states that the shape of the response must match that of the request. https://spec.graphql.org/October2021/#sec-Language.Fields, https://spec.graphql.org/October2021/#sec-Overview

query {
  Users(groupBy: [Name]) {
    _group {
      Age
    }
  }
}

returns

{
  "Name": "Alice",
  "_group": [
    {"Age": 19}
  ]
}

but should return

{
  "_group": [
    {"Age": 19}
  ]
}