[nnpi glow unit test] SLS tests shape sweep with hypothesis testing (#36833)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/36833
Add hypothesis testing sweep for one test in each SLS test suite for different precisions.
Sweep random seed, embedding shape, batch_size, weight with hypothesis testing.
Refactor sls tests into proper file with precision labeled in filename.
Test Plan:
FB intern: buck test mode/dev //caffe2/caffe2/contrib/fakelowp/test:test_sls_8bit_nnpi_fp32nnpi
Will test OSS after exporting PR.
Reviewed By: yinghai
Differential Revision: D21098346
fbshipit-source-id: af167118e5289bb7178ffc27aaec3af101dcd828
