[quant][eagermode] Add additional_fuser_method_mapping to config (#46355)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/46355
Test Plan: Imported from OSS
Reviewed By: vkuzo
Differential Revision: D24319562
fbshipit-source-id: be9800723c0b3e36f26e73c25c0c6ae1d4344f45
