Make torch.device usable as a context manager (#91525)
Fixes https://github.com/pytorch/pytorch/issues/82296
Fixes https://github.com/pytorch/pytorch/issues/27878
Fixes https://github.com/pytorch/pytorch/issues/260
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/91525
Approved by: https://github.com/albanD
