pytorch

0a0ff831 - replace `num_bits` with `quant_min` and `quant_max` (#21097)

replace `num_bits` with `quant_min` and `quant_max` (#21097) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/21097 att Differential Revision: D15547166 fbshipit-source-id: 60bc7f7d82c424558b67881627fb74f1eff515af