stop sccache server after building (#72794)
Summary:
This is to avoid the directory , where the sccache is installed, couldn't be deleted.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/72794
Reviewed By: H-Huang
Differential Revision: D34222877
Pulled By: janeyx99
fbshipit-source-id: 2765d6f49b375d15598586ed83ae4c5e667e7226
(cherry picked from commit 551e21ca582c80d88a466b7bfe4eda9dee0c9a5f)
