🚀 Feature

Add complex number support for torch.remainder.

Motivation

When porting remainder from TH to ATen, I noticed that other operators, like torch.div, have support for complex numbers. It wasn't mathematically clear to me how to implement support for complex numbers in torch.remainder, and since the original TH implementation did not have it, it was outside the scope of that issue.

Pitch

@nikitaved explained some of the details of how complex support could be implemented in these comments:

#24753 (comment)

#24753 (comment)

cc @ezyang @anjali411 @dylanbespalko @mruberry