[docs][ao] Add missing documentation for torch.quantized_batch_norm (#63240)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/63240
Op is exposed via torch.quantized_batch_norm to the end user without any existing documentation
Test Plan:
CI
Imported from OSS
Reviewed By: VitalyFedyunin
Differential Revision: D30316431
fbshipit-source-id: bf2dc8b7b6f497cf73528eaa2bedef9f65029d84
