nvfuser microbenches - import utils from torch.utils (#854)
Summary:
Pull Request resolved: https://github.com/pytorch/benchmark/pull/854
Prevents duplicating code.
Depends on https://github.com/pytorch/pytorch/pull/75436 which moves log_extract.py utils into torch.utils.
Test Plan: Imported from OSS
Reviewed By: shunting314
Differential Revision: D35502315
Pulled By: davidberard98
fbshipit-source-id: dfd76edc0acdb315f22f5a4b2be9ad4a526b614e
