torchrec: adjust log level for a verbose log line (#1629)

Summary:
Pull Request resolved: #1629

Avoid spammy logs like this: https://www.internalfb.com/phabricator/paste/view/P1001268340

Reviewed By: henrylhtsang

Differential Revision: D52663009

fbshipit-source-id: ac05e54c2abb3742eb1af14e168d667c52a939aa

torchrec/distributed/planner/partitioners.py

@@ -80,7 +80,7 @@ def _group_and_sort_non_uniform_sharding_options(
         if path not in param_count:
             param_count[path] = 0
         param_count[path] += 1
-    logger.info(f"param_count is {param_count}")
+    logger.debug(f"param_count is {param_count}")
 
     sharding_option_groups_by_dependency = {}
     for sharding_option in sharding_options: