fix gather issue when index is shape of n by 1 (#99709)
Fix https://github.com/pytorch/pytorch/issues/99595
When the index is shape of {N, 1}, it will also have strides of {1, 0}, which is the same as an expanded tensor (e.g. shape of {5, 5} and strides {1, 0}), leading to wrong output.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/99709
Approved by: https://github.com/XiaobingSuper, https://github.com/ezyang
