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**Description**
Unify metric names of benchmarks.

**Description**
Add option `force_fp32` to use fp32 instead of tf32, only takes effect on Ampere or newer GPUs.

* replace torch.optim.AdamW with transformers.AdamW.

* Clean up the cache.

Co-authored-by: Guoshuai Zhao <guzhao@microsoft.com>
Co-authored-by: Yifan Xiong <yifan.xiong@microsoft.com>

* skip unnecessary tests according to env var
* remove useless tests

Benchmarks: Code Revision - Revise BenchmarkRegistry interfaces for integration with executor. (#33)

* revise BenchmarkRegistry interfaces.
* address comments
Co-authored-by: Guoshuai Zhao <guzhao@microsoft.com>

* move benchmarks registration from registry.py to __init__.py

* revise __init__.
Co-authored-by: Guoshuai Zhao <guzhao@microsoft.com>

* add pytorch base tests.

* add more test cases.
Co-authored-by: Guoshuai Zhao <guzhao@microsoft.com>