Add support for Dynamic LSTM quantization on Mobile (#32757)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/32757
This PR updates the main quantize_dynamic API to use QNNPACK backend for mobile
Test Plan:
python test/test_quantization.py PostTrainingDynamicQuantTest.test_quantized_rnn
Imported from OSS
Differential Revision: D19632220
fbshipit-source-id: b4c51485c281d088524101b97c84dd806438b597
