[FX] Add Node.all_input_nodes (#48270)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/48270
Test Plan: Imported from OSS
Reviewed By: Chillee
Differential Revision: D25100241
Pulled By: jamesr66a
fbshipit-source-id: f742f5a13debebb5be37f7c0045c121f6eaff1d5
