[pytorch] check in default generated op dependency graph (#43570)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/43570
Add the default op dependency graph to the source tree - use it if user runs
custom build in dynamic dispatch mode without providing the graph.
Test Plan: Imported from OSS
Reviewed By: ezyang
Differential Revision: D23326988
Pulled By: ljk53
fbshipit-source-id: 5fefe90ca08bb0ca20284e87b70fe1dba8c66084
