[fx_glow]Add Support for importing quantized linear in FXIRImporter (#57483)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/57483
Pull Request resolved: https://github.com/pytorch/glow/pull/5622
Quantized linear has packed parameters. We want to unpack it so that it would be easier for graph optimization and importer to deal with the weight and bias. A customized remapping function is used to unpack quantized linear and map it to acc_op.linear.
Test Plan: `buck test glow/fb/fx/nnpi_importer:test_importer`
Reviewed By: gcatron, jfix71, khabinov
Differential Revision: D27451237
fbshipit-source-id: e46e961734788fd5333e227ca6143fd37c33204e
