Add OpInfo test to check that floating point inputs in OpInfos have requires_grad set to True (#69909)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/69909
This test detected a number of sampling methods that were not generating
the samples as expected, e.g. `index_put`, `cosine_embedding`, `stft`, but
perhaps most notably the generator for `BinOps`.
It also detected that `reminder` and `fmod` did not have implemented the
backward formula for the second input. I added this in the previous PR.
Test Plan: Imported from OSS
Reviewed By: anjali411
Differential Revision: D33774422
Pulled By: mruberry
fbshipit-source-id: 76cfc75b1fdfd72ee64aa524665f83a75fe52509
(cherry picked from commit 13ea7b436bc6301be4cf7bb7d559177d895502b3)
