Upgrade and fix boto3 version to 1.19.12 (#68025)
Summary:
The new boto3 version could be causing the macos test reporting to fail. Pinning to version 1.19.12
example fail: https://app.circleci.com/pipelines/github/pytorch/pytorch/406385/workflows/f15ca6ba-e8af-45a3-b1b0-c0298ea3fe9d/jobs/16687920
Pull Request resolved: https://github.com/pytorch/pytorch/pull/68025
Reviewed By: malfet, seemethere
Differential Revision: D32261971
Pulled By: janeyx99
fbshipit-source-id: 1a2cd636a2f0b206921749c3f0c9e4707c9a1222
