Explain incorrectly reporting filter for related types.

[jsimnz]

A query with a related type, with a filter applied to the related type, is being incorrectly reported.

Eg:

query {
  User(friends: {name: { _eq: "John"}}) {
    ...
  }
}

Will assign the filter fiends: {name: {_eq: "John"}} to the scanNode on the root of the typeJoin. But it should be reported on the selectNode above the typeJoin.

The actual filter is correctly applies to the selectNode, but the way the filters are rendered, misrepresents this.

Related to #1539