Found by fuzz testing, root caused to #7479 - fixing this issue for Var
in a similar way to how it was fixed for Let in that patch (by adding
`RuntimeBindingName` to the possible things in the name binding.
Not sure if this would be better fixed by adding `RuntimeBindingName` to
`AnyRuntimeBindingPatternName` or something else?
Assisted-By: Gemini with Antigravity
