Add OneCycleLR (#25324)
Summary:
Squash rebase of https://github.com/pytorch/pytorch/issues/21258
ghstack-source-id: 7d3ce522ac4dd3050bc6c6bbda1eaaeb8bc4b2c1
Pull Request resolved: https://github.com/pytorch/pytorch/pull/25324
Pull Request resolved: https://github.com/pytorch/pytorch/pull/25325
Differential Revision: D17095722
Pulled By: vincentqb
fbshipit-source-id: 7fe69b210924ee3b39223dd78122aea61267234a
