Add remote cache time saved to compilation metrics (#2449)
Summary:
Pull Request resolved: https://github.com/pytorch/benchmark/pull/2449
X-link: https://github.com/pytorch/pytorch/pull/135490
Record remote cache time saved via frame_phase_timing
We add to the "phase" when remote cache hits and saves us time, so that we have a 1:1 correspondence between a frame and time saved.
Reviewed By: aorenste
Differential Revision: D62106921
fbshipit-source-id: 57f84c189fea7a40ad836c7f59f6801d22973c4f
