[pytorch] add per_sample_weights support for embedding_bag_4bit_rowwise_offsets (#63605)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/63605
Reviewed By: houseroad
Differential Revision: D30434664
fbshipit-source-id: eb4cbae3c705f9dec5c073a56f0f23daee353bc1
