Rename profile.next_step() to profile.step() to consistent with optimizer.step() (#51032)
Summary:
Similar with Optimizer.step(), profile.next_step() occurs every iteration and calls at the end of each iteration. So it's better to make them same naming style.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/51032
Reviewed By: heitorschueroff
Differential Revision: D26097847
Pulled By: ilia-cher
fbshipit-source-id: ea2e5c8e865d99f90b004ec7797271217efeeb68
