Update buildTypeWeights to handle lists on types other than the root Query type

Currently `buildTypeWeights` only generates a `WeightFunction` for queries that live on the root `Query` type. This functionality should be expanded to handled queries resolving to bounded lists that live on any type. 

- [ ] TODO Enable tests under `fields returning lists of objects of determinate size and...are not on the Query type` to show resolution of this issue. 