ruff

03fb2e5a - [red-knot] split call-outcome enums to their own submodule (#14898)

[red-knot] split call-outcome enums to their own submodule (#14898) ## Summary This is already several hundred lines of code, and it will get more complex with call-signature checking. ## Test Plan This is a pure code move; the moved code wasn't changed, just imports. Existing tests pass.