Upload sccache stats (#65582)
Summary:
This adds some tracking to metrics.pytorch.org for sccache build stats per environment
Pull Request resolved: https://github.com/pytorch/pytorch/pull/65582
Reviewed By: malfet, zhouzhuojie, janeyx99
Differential Revision: D31160761
Pulled By: driazati
fbshipit-source-id: a497918bafbe610a51c92a9139684cd3efe670d3
