ai-pep: match the qlinear benchmark to linear (#36674)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/36674
Slight changes to qlinear benchmark to have it be in the same format
as linear, for fairer comparisons between FP and Q.
Test Plan:
```
cd benchmarks/operator_benchmark
python -m pt.linear_test
python -m pt.qlinear_test
```
Imported from OSS
Differential Revision: D21102562
fbshipit-source-id: 4f5c693b5de7e26c4326a9ec276560714290f6c6
