Resolve Autograd key for disable_variable_dispatch flag. (#44268)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/44268
Test Plan: Imported from OSS
Reviewed By: ngimel
Differential Revision: D23561042
Pulled By: ailzhang
fbshipit-source-id: 6f35cd9a543bea3f9e294584f1db7c3622ebb741
