Added lazy tensor testing CI. (#600)
Summary:
Setup initial framework for lazy tensor nightly testing.
Pull Request resolved: https://github.com/pytorch/benchmark/pull/600
Reviewed By: wconstab
Differential Revision: D32845307
Pulled By: xuzhao9
fbshipit-source-id: c27f01045a1d1aa869b5b8d6b6e721f04bf2fef2
