cannot import name 'hip' from 'torch'

https://github.com/linkedin/Liger-Kernel/blob/911db5dd35d3508b0b3d6416af12f4c1bdc6419e/src/liger_kernel/utils.py#L12

`torch.hip` seems not to exist:

```python
>>> from torch import hip
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: cannot import name 'hip' from 'torch' (/fsx/qgallouedec/miniconda3/envs/trl/lib/python3.12/site-packages/torch/__init__.py)
```