[ao] Changed ratio of channels needed for input-weight rec (#82795)
Summary: After working on a tutorial and spending more time
experimenting with the input-weight equalization recommendation feature,
I realized that having half as the number of channels to benefit from
input-weight was too high, and that it should be a bit more lenient.
Based on the example I played around with in an internal tutorial, I
found that somewhere in the 0.3 - 0.4 threshold made more sense. In the
future, more in-depth testing and experimenting with more models may
help further fine-tune this fraction of channels that would benefit.
Test Plan: python test/test_quantization.py TestFxDetectInputWeightEqualization
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Pull Request resolved: https://github.com/pytorch/pytorch/pull/82795
Approved by: https://github.com/jerryzh168
