[Profiler] Update python binding type annotations (#85722)
The annotations for `torch._C._profiler` have gotten a bit stale. This PR simply brings them up to date.
There is one small quality of life change that alters behavior: instead of returning device type and index separately we return a `torch.device` object.
Differential Revision: [D39852803](https://our.internmc.facebook.com/intern/diff/D39852803/)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/85722
Approved by: https://github.com/chaekit
