Move sccache compilation log to its own group (#71444)
Summary:
The sccache compilation log is often misleading.
We can move it to its own group so people don't see it right away
Pull Request resolved: https://github.com/pytorch/pytorch/pull/71444
Reviewed By: atalman
Differential Revision: D33659650
Pulled By: janeyx99
fbshipit-source-id: f22fd21640a8747beeacce8857bbb8281efd76f4
(cherry picked from commit e25970abf99801fc04d4ae15f8f5ffe63dd1dc41)
