Add a workflow to cache third party dependencies on S3 (#83306)
For the context, see #75703, pytorch/builder#1096.
Note: depends on the docker image `pytorch/sync_s3_thirdparty_deps` from pytorch/builder#1096
Summary of additions:
* workflow config (based on pytorch/sync_s3_thirdparty_deps GH action)
* S3 mapping config (sync_s3_cache.yml)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/83306
Approved by: https://github.com/huydhn
