Expose ExecutionPlan in prep for function calls (#21273)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/21273
ghimport-source-id: b92c1e07fbe4122467a21b98d29635295093e0c2
Reviewed By: jamesr66a
Differential Revision: D15600067
Pulled By: zdevito
fbshipit-source-id: 82b7de458dd65c175f55b0f383bfc3fcf4704032
