[quant][graphmode][fx][test][refactor] Refactoring binary op tests to split int8 and float16 tests (#52807)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/52807
Test Plan: Imported from OSS
Reviewed By: vkuzo
Differential Revision: D26655617
fbshipit-source-id: c36edef09f522fe4c8eb0a8872add80c8dae4938
