fix: ensure visit is called with correct state

[dummdidumm]

Some of our visit calls have the wrong current state associated with it. To fix it, we need to pass the real current one. fixes #11722

While doing so I discovered that we're not updating the scope correctly in some places - right now it more or less works by accident because in the scope analysis phase we're creating the scope on the parent, not the fragment in a lot of cases (but not all, which is why it had to be adjusted in some places). This is brittle so I adjusted the logic to be more robust (this will likely save us some trouble when we eventually remove the slot scoping logic).

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