Improve error messages of `torch.testing.assert_close` for sparse inputs (#61583)
Summary:
This utilizes the feature introduced in https://github.com/pytorch/pytorch/issues/60091 to modify the header of the error message.
Before:
```python
AssertionError: Tensor-likes are not equal!
Mismatched elements: 1 / 2 (50.0%)
Greatest absolute difference: 1 at index 1
Greatest relative difference: 0.3333333432674408 at index 1
The failure occurred for the values.
```
After:
```python
AssertionError: Sparse COO values of tensor-likes are not equal!
Mismatched elements: 1 / 2 (50.0%)
Greatest absolute difference: 1 at index 1
Greatest relative difference: 0.3333333432674408 at index 1
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/61583
Reviewed By: malfet
Differential Revision: D30014797
Pulled By: cpuhrsch
fbshipit-source-id: 66e30645e94de5c8c96510822082ff9aabef5329
