Rename profiler metadata key (#63743)
Summary:
rename metadata key to be the same with variable name
Pull Request resolved: https://github.com/pytorch/pytorch/pull/63743
Reviewed By: albanD
Differential Revision: D30839501
Pulled By: gdankel
fbshipit-source-id: b9b4e670dcc9557b8d8d0730baea0ad39a1a0ca4