[SR][easy] Alias for c10::Symbol::fromQualString (#67162)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/67162
It's a bit annoying/ugly to type `c10::Symbol::fromQualString` everywhere, and we can't do `using c10::Symbol::fromQualString` since it's a static class function.
Test Plan: CI
Reviewed By: d1jang
Differential Revision: D31887042
fbshipit-source-id: 073a56c72281c20284a9feef741aed96b58a921d
