swift

ea8217ad - [Effects handling] Collapse "Handled" and "NonThrowingFunction" kinds.

[Effects handling] Collapse "Handled" and "NonThrowingFunction" kinds. Finish eliminating error-handling-specific information from the "kind" of the effects-handling context, so that it only distinguishes between "potentially handles effects" and "never handles effects". Use queries for specific issues (e.g., "handles errors") instead.