ns for fx: move lstm dynamic weight test case to new API (#53772)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/53772
Moves the test case for extracting LSTM dynamic weights to new NS API.
Test Plan:
```
python test/test_quantization.py TestFXNumericSuiteCoreAPIsModels.test_compare_weights_lstm_dynamic
```
Imported from OSS
Reviewed By: hx89
Differential Revision: D26967104
fbshipit-source-id: 0d17e7735ec361167dcf72bcb373bfc1aad84668
