Add gcp a100 dind docker build (#1247)
Summary:
Add dockerfile to build dind docker for the GCP A100 runner.
Pull Request resolved: https://github.com/pytorch/benchmark/pull/1247
Reviewed By: davidberard98
Differential Revision: D40557290
Pulled By: xuzhao9
fbshipit-source-id: be829ba1ecfb94726279e29b9eada056fa4b9d57
