[Profiler] Memory profiler part 11: Mark tensors created in the backward pass which don't correspond to parameters. (#88926)
There are various Tensors created in the backward pass which do not correspond to parameters. We don't want to mark these as gradients, but we do still want to convey as much information as possible. Thus, this PR introduces an AUTOGRAD_DETAIL category. (Which can be grouped with GRADIENT in visualization if one wishes to take a coarse grained view of the world.)
Differential Revision: [D40868661](https://our.internmc.facebook.com/intern/diff/D40868661/)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/88926
Approved by: https://github.com/chaekit
