fix #46918, unstable jl_binding_type behavior

[JeffBezanson]

fix #46918

Now it will return nothing before the binding has been resolved, and afterward fully look up the binding as declared by the owner.
I followed the comment here, which says the function doesn't resolve the binding.

[JeffBezanson]

julia> ccall(:jl_binding_type, Any, (Any, Any), Main, :stderr)

julia> stderr
Base.TTY(RawFD(15) open, 0 bytes waiting)

julia> ccall(:jl_binding_type, Any, (Any, Any), Main, :stderr)
IO

julia> ccall(:jl_binding_type, Any, (Any, Any), Main, :stderr)
IO

[aviatesk]

Maybe we want abstract_eval_globalref to try to resolve a binding always? Or will it cost too much?

[JeffBezanson]

It shouldn't, to avoid inference having side effects.

[aviatesk]

Can we probably add this test case?

let # https://github.com/JuliaLang/julia/issues/46918
    code = quote
        res1 = ccall(:jl_binding_type, Any, (Any, Any), Main, :stderr)

        stderr

        res2 = ccall(:jl_binding_type, Any, (Any, Any), Main, :stderr)

        res3 = ccall(:jl_binding_type, Any, (Any, Any), Main, :stderr)

        print(stdout, res1, " ", res2, " ", res3)
    end |> string
    cmd = `$(Base.julia_cmd()) -e $code`
    stdout = IOBuffer()
    stderr = IOBuffer()
    @test success(pipeline(Cmd(cmd); stdout=stdout, stderr=stderr))
    @test String(take!(stdout)) == "nothing IO IO"
    @test isempty(String(take!(stderr)))
end