[MPS] Pixel shuffle unshuffle support (#99306)
Fixes #83196
Now, MPS implementation is blazingly fast.
Though, I have several questions on improving this PR:
1. I copied code from `test_nn.py`. Is there better way to test this?
2. I decided to use `usepixelshuffleorder:YES`. Am I right performance-wise? According to docs:
```
`usePixelShuffleOrder` can be
used to control how the data within spatial blocks is ordered in the
`depthAxis` dimension: with `usePixelShuffleOrder=YES` the values within the
spatial blocks are stored contiguosly within the `depthAxis` dimension whereas
otherwise they are stored interleaved with existing values in the `depthAxis` dimension.
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/99306
Approved by: https://github.com/kulinseth, https://github.com/malfet
