[quant][graphmode][fx] Add reference option support for linear_static_fp16 (#52650)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/52650
linear_dynamic_fp16 has following dtypes for activation, weight, bias, output:
(fp32, fp16, fp32, fp32)
linear_static_fp16 has following dtypes:
(fp16, fp16, fp16, fp16)
Test Plan: Imported from OSS
Reviewed By: vkuzo
Differential Revision: D26599803
fbshipit-source-id: b4a8345d355125070be718a227288cc848cc8bbc
