[ONNX] Format ONNX python with black
Format all onnx python code with black and isort with
```sh
isort torch/onnx/ test/onnx
black torch/onnx/ test/onnx
```
Updated lintrunner config to include these paths.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/76754
Approved by: https://github.com/suo, https://github.com/BowenBao
