Move log_normal_() to DistributionTemplates (#37392)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/37392
Fixes #37368
Test Plan: Imported from OSS
Differential Revision: D21290740
Pulled By: pbelevich
fbshipit-source-id: 15a76b2625d2ca8187c25333a86eecd111a259c6
