[MPS] Fix correctness issues with Upsample 1D and 2D (#91669)
- Implemented following new ops: upsample_nearest1d_backward
upsample_nearest_exact1d
upsample_nearest_exact1d_backward
- Moved Upsample code from Shape.mm to Upsample.mm
- Fallback to CPU for nearest mode on Monterey
Pull Request resolved: https://github.com/pytorch/pytorch/pull/91669
Approved by: https://github.com/malfet
