[NVFuser] fix incorrect vector size in chunk move
Internally there's some modes that run with -D_GLIBCXX_ASSERTIONS, which was throwing out of bounds errors at `strides[output_index]`
Pull Request resolved: https://github.com/pytorch/pytorch/pull/75765
Approved by: https://github.com/jjsjann123, https://github.com/cpuhrsch
