Rejig `rustc_with_all_queries!` There are three things relating to `rustc_with_all_queries!` that have been bugging me. - `rustc_with_all_queries!`'s ability to receive `extra_fake_queries` lines like `[] fn Null(()) -> (),` where the only real thing is the `Null`, and everything is just pretending to be a normal query, ugh. - `make_dep_kind_array!`: a macro produced by one macro (`define_dep_nodes!`) and used by another macro (`define_queries!`) in another crate, ugh. - The `_dep_kind_vtable_ctors` module, which is a special module with no actual code that serves just a way of collecting vtable constructors from two different places so they can be referred to by `make_dep_kind_array!`, ugh. By making some adjustments to how `rustc_with_all_queries!` works, all three of these things are eliminated. r? @Zalathar
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