[quant][graphmode][fx] Add support for quantizing functional linear + {functional relu/module relu} (#50975)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/50975
Test Plan: Imported from OSS
Reviewed By: supriyar
Differential Revision: D26032532
fbshipit-source-id: a084fb4fd711ad52b2da1c6378cbcc2b352976c6
