[static runtime] register pow out variant (#52454)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/52454
Test Plan:
adfinder local net
Before:
7.13307 ms/iter
0.0222672 ms. 0.311136%. aten::pow (1 nodes)
After:
7.10623 ms/iter
0.0174462 ms. 0.242774%. aten::pow (1 nodes)
Reviewed By: malfet, hlu1
Differential Revision: D26521717
fbshipit-source-id: 8d9279b59d37c8786a9eeccd0f54bd84c400c128
