[FX] Added partial concrete values for symbolic tracing (#51609)
Summary:
Currently it's passed in a dict but might be worth considering whether we want to support other methods of passing it in (like a list corresponding to the positional args).
Pull Request resolved: https://github.com/pytorch/pytorch/pull/51609
Reviewed By: zou3519
Differential Revision: D26224464
Pulled By: Chillee
fbshipit-source-id: 305769db1a6e5fdcfb9e7dcacfdf153acd057a5a
