[Torch Device][c10] Fix the expected torch device error message (#36446)
Summary:
This PR made the expected torch device string error message to include `xla` as the acceptable torch device prefix string.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/36446
Test Plan:
No Logic changed, and made sure `xla` is acceptable in `torch.device`.
```
import torch
device = torch.device("xla")
```
```
device = torch.device("unrecognized")
RuntimeError: Expected one of cpu, cuda, mkldnn, opengl, opencl, ideep, hip, msnpu, xla device type at start of device string: unrecognized
```
Differential Revision: D20993449
Pulled By: dahsh
fbshipit-source-id: 83afe4f913a650a655bfda9c2a64bf9e5aa27e16
