ns for fx: fix typing issue in weight extraction (#62041)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/62041
Before this PR, weights of conv and linear modules were extracted
as lists, in order to match the signature of LSTM weights.
After this PR, weight extraction preserves the type of the weights,
so extracted weights of conv and linear have a different type
from LSTM weights. The comparison util functions are updated to
handle the LSTM weight type of `List[tensor]`.
Test Plan:
```
python test/test_quantization.py TestFXNumericSuiteCoreAPIs
python test/test_quantization.py TestFXNumericSuiteCoreAPIsModels
```
Imported from OSS
Reviewed By: jerryzh168
Differential Revision: D29853626
fbshipit-source-id: 93da5b9b0b174679c61528d02b6b902cb064444e
