No-batch-dim support for ConvNd (#70506)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/70506
Test Plan: Imported from OSS
Reviewed By: albanD
Differential Revision: D33355034
Pulled By: jbschlosser
fbshipit-source-id: 5a42645299b1d82cee7d461826acca1c5b35a71c
