How to install open3d with PyTorch 1.10.1

### Checklist

- [X] I have searched for [similar issues](https://github.com/isl-org/Open3D-ML/issues).
- [X] I have tested with the [latest development wheel](http://www.open3d.org/docs/latest/getting_started.html#development-version-pip).
- [X] I have checked the [release documentation](http://www.open3d.org/docs/release/) and the [latest documentation](http://www.open3d.org/docs/latest/) (for `master` branch).

### My Question

Hi,

How to install open3d with PyTorch 1.10.1?

I ran `pip install open3d` and then `python -c "import open3d.ml.torch as ml3d"`. The following exception appears:

```
Exception: Version mismatch: Open3D needs PyTorch version 1.12.*, but version 1.10.1 is installed!
```

My environment:
- Python 3.8
- PyTorch 1.10.1
- CUDA 11.3

I saw the similar issue https://github.com/isl-org/Open3D-ML/issues/588#issuecomment-1466454676, but I cannot see how changing the local file `Open3D-ML/requirements-torch-cuda.txt` would help with pip install. I tried this but got the same exception.

Is it possible to pip install open3d under my environment? Or I might have missed something obvious. Thank you for any help!