ruff

4d2ee41e - [ty] Move constraint set mdtest functions into `ConstraintSet` class (#21108)

[ty] Move constraint set mdtest functions into `ConstraintSet` class (#21108) We have several functions in `ty_extensions` for testing our constraint set implementation. This PR refactors those functions so that they are all methods of the `ConstraintSet` class, rather than being standalone top-level functions. :tophat: to @sharkdp for pointing out that `KnownBoundMethod` gives us what we need to implement that!