[quant] Equalization Observer modifications (#59953)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/59953
The following modifications were made to the equalization
observers due to design changes:
- [InputEqualizationObserver] Replaced `calculate_qparams()` with
`calculate_scaled_minmax()` since we will need to return the scaled
min/max values to update the following input quantization observer
- [WeightEqualizationObserver] We no longer need a row observer since
this will be taken care of by the following weight quantization observer
- [WeightEqualizationObserver] Following the previous comment, we no
longer need to calculate the scaled qparam values. Instead, we will use
the equalization scale to later scale the weights and the qparams will
be taken care of by the weight quantization observer.
Test Plan:
`python test/test_quantization.py
TestEqualizeFx.test_input_weight_eq_observer`
Imported from OSS
Reviewed By: supriyar
Differential Revision: D29135332
fbshipit-source-id: be7e468273c8b62fc183b1e1ec50f6bd6d8cf831
