[TensorExpr] Add another test for ExternalCalls. (#52162)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/52162
This test demonstrates how external calls can interoperate with other
tensor computations and between themselves.
Test Plan: Imported from OSS
Reviewed By: bertmaher
Differential Revision: D26410813
Pulled By: ZolotukhinM
fbshipit-source-id: 8180164013b43f613d53620d1b249e0af769ae8e
Author
Mikhail Zolotukhin
