[ONNX] Update sum symbolic to handle dtypes (#64289)
* Update aten::sum symbolic for dtype
* Remove nesting and modify opeartor tests
* Fix expect files
[ONNX] Fix expect files added in #64289 (#65356)
ghstack-source-id: 0cfc431210bb69809aa7ca9d5e8f000a640434f4
Pull Request resolved: https://github.com/pytorch/pytorch/pull/66141
