[MPS] Fix channels last copies in ELU,ReLU and Hardswish (#94664)
Fixes test_modules.py tests:
```
test_memory_format_nn_Hardswish_mps_float32
test_non_contiguous_tensors_nn_Hardswish_mps_float32
test_memory_format_nn_ReLU_mps_float32
```
Fixes elu when ran with `ChannelsLast` memory format.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/94664
Approved by: https://github.com/kulinseth
