Migrate to AWS A100 runner (#2549)
Summary:
Now PyTorch provides A100 runner on AWS, we can deprecate Torchbench's own A100 testing infra and inherit the testing infra from PyTorch.
Pull Request resolved: https://github.com/pytorch/benchmark/pull/2549
Reviewed By: kit1980
Differential Revision: D66450676
Pulled By: xuzhao9
fbshipit-source-id: 33b8b7547688be0b96703dcd696641c13e079f5f
