add "#type: ignore" to empty python enum types. Fixes #652

[susitsm]

The issue is caused by: https://github.com/python/mypy/blob/release-1.14/mypy/checker.py#L2602

There is no method to disable this exact lint, so I disabled type checking on the empty enum types. That fixes the issue.

There is another possible fix, without disabling type checking: we can emit all enum variants. That makes _iced_x86_py.pyi 7000 lines long, so I went with the cleaner one.

[wtfsck]

Thanks!