LU-16329 Revert "LU-8621 utils: cmd help to stdout or short cmd error"

LU-16329 Revert "LU-8621 utils: cmd help to stdout or short cmd error"

This reverts commit 608d763955d7e0a9c438c317e595f14825e9423b.
This breaks bash command completion.

Fixes: bc69a8d058 ("LU-8621 utils: cmd help to stdout, short cmd error")
Test-Parameters: trivial
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I004ea5af499593b0f36ba17ff5f517548f0ea0f9
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/49416
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>