ruff

caf3c916 - [ty] Refactor argument matching / type checking in call binding (#18997)

[ty] Refactor argument matching / type checking in call binding (#18997) This PR extracts a lot of the complex logic in the `match_parameters` and `check_types` methods of our call binding machinery into separate helper types. This is setup for #18996, which will update this logic to handle variadic arguments. To do so, it is helpful to have the per-argument logic extracted into a method that we can call repeatedly for each _element_ of a variadic argument. This should be a pure refactoring, with no behavioral changes.