Update the config to use a100 runner (#926)
Summary:
This PR updates the benchmark config runner to use Google Cloud A100 instance.
Test workflow: https://github.com/pytorch/benchmark/actions/runs/2373012767
Pull Request resolved: https://github.com/pytorch/benchmark/pull/926
Reviewed By: erichan1
Differential Revision: D36600806
Pulled By: xuzhao9
fbshipit-source-id: db248c9d12624de6fdae11464133003e4ddc2fd3
