[autograd] Demote the dist container shard line to VLOG(1) (#36978)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/36978
We're seeing quite a bit of these running unittests, might be a
bit verbose at LOG(INFO)
ghstack-source-id: 102557335
Test Plan: regular unittest coverage, this is logging-only
Differential Revision: D21149262
fbshipit-source-id: 4992342883920f58484afd8b1e432c1455035835
