Add dynamo_compile fields for pre-dispatch/joint/post-dispatch times (#140306)
Summary:
Tested internally: P1679622670
X-link: https://github.com/pytorch/pytorch/pull/140306
Approved by: https://github.com/ezyang
Reviewed By: kit1980
Differential Revision: D65986059
Pulled By: masnesral
fbshipit-source-id: f9eb85bebe3d3e222fb27b9874547667667c4c56