Fix TE microbenchmark harness to use appropriate fuser/executor (#42900)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/42900
Test Plan: Imported from OSS
Reviewed By: ZolotukhinM
Differential Revision: D23079715
Pulled By: bertmaher
fbshipit-source-id: 6aa2b08a550835b7737e355960a16a7ca83878ea