[quant][pt2e] Add test for serialize and deserialize quantized model (#109158)
Summary:
att
Test Plan:
python test/test_quantization.py TestQuantizePT2E.test_save_load
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Pull Request resolved: https://github.com/pytorch/pytorch/pull/109158
Approved by: https://github.com/andrewor14
ghstack dependencies: #108924, #108925
