[quant][graphmode] Refactor dynamic quant tests (#40127)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/40127
Reland PR.
Similar to static quant, break it up into op level tests and tests for jit passes
Test Plan:
python test/test_quantization.py TestQuantizeScriptPTDQOps
python test/test_quantization.py TestDynamicQuantizeScriptJitPasses
Imported from OSS
Differential Revision: D22081259
fbshipit-source-id: cef8f78f89ef8789683b52508379ae1b9ad00700
