set data permits requires_grad=True on integer tensor

### 🐛 Describe the bug

```
>>> import torch
>>> x = torch.randn(2, requires_grad=True)
>>> x.data = torch.randint(1, (2,))
>>> x
tensor([0, 0], requires_grad=True)
```

However, it is supposed to be illegal for integer tensor to requires_grad True

### Versions

master

cc @ezyang @albanD @zou3519 @gqchen @pearu @nikitaved @soulitzer @Lezcano @Varal7