Fix internal assert for torch.heaviside with cuda tensor and cpu scalar tensor (#46831)
Summary:
Fixed https://github.com/pytorch/pytorch/issues/46681
```
>>> x = torch.randn(10, device='cuda')
>>> y = torch.tensor(1.)
>>> torch.heaviside(x, y)
tensor([0., 1., 0., 1., 1., 0., 1., 1., 1., 0.], device='cuda:0')
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/46831
Reviewed By: navahgar
Differential Revision: D24567953
Pulled By: izdeby
fbshipit-source-id: e5fcf4355b27ce0bdf434963d01863d3b24d0bea
