[pytorch][quantization] adding jit state for QuantizedLeakyReLU (#47660)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/47660
Currently, `QuantizedLeakyReLU` doesn't have any items in the `state_dict`. However, this operator needs to store the `scale` and `zero_point` in its state dictionary or the loading state dict for a quantized model with LeakyReLUs that have non-default quantization params would break.
Test Plan:
Originally the issue was found here: https://www.internalfb.com/intern/anp/view/?id=390362&revision_id=2510709822565735
In the latest version, I fixed this issue: https://www.internalfb.com/intern/anp/view/?id=390362
Reviewed By: jerryzh168
Differential Revision: D24757522
fbshipit-source-id: 57e1dea072b5862e65e228e52a86f2062073aead
