align qlinear benchmark to linear benchmark (#42767)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/42767
Same as previous PR, forcing the qlinear benchmark to follow the fp one
Test Plan:
```
cd benchmarks/operator_benchmark
python -m pt.linear_test
python -m pt.qlinear_test
```
Imported from OSS
Reviewed By: jerryzh168
Differential Revision: D23013937
fbshipit-source-id: fffaa7cfbfb63cea41883fd4d70cd3f08120aaf8
