Install sccache from source (#46672)
Summary:
Build `sccache` from https://github.com/pytorch/sccache
Also, update sccache wrappers not to call sccache from sccache
Pull Request resolved: https://github.com/pytorch/pytorch/pull/46672
Reviewed By: janeyx99
Differential Revision: D24455767
Pulled By: malfet
fbshipit-source-id: b475a65e6ad03b9a192ab29a6d9a14280cd76a92
