resolve conjugate bit in `torch.testing.assert_close` (#60522)
Summary:
We need to resolve the conjugate bit for complex tensors, because otherwise we may not be able to access the imaginary component:
```python
>>> torch.tensor(complex(1, 1)).conj().imag
RuntimeError: view_as_real doesn't work on unresolved conjugated tensors. To resolve the conjugate tensor so you can view it as real, use self.resolve_conj(); however, be warned that the resulting tensor will NOT alias the original.
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/60522
Reviewed By: ngimel
Differential Revision: D29353095
Pulled By: mruberry
fbshipit-source-id: c36eaf883dd55041166f692f7b1d35cd2a34acfb
