[JIT] Make NoneType annotation_str emit `NoneType` instead of `None` (#54642)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/54642
Test Plan: Imported from OSS
Reviewed By: SplitInfinity
Differential Revision: D27314174
Pulled By: jamesr66a
fbshipit-source-id: 153e9aa4ab781fa1d49d9d55a2e487bf7b04f0d7
