A few improvements to run-deploy.sh:

A few improvements to run-deploy.sh:

* deal with those annoying `Ignoring curb-0.9.10 because its extensions
are not built.  Try: gem pristine curb --version 0.9.10` warnings so we
don't display them, for real this time.

* prefix output of remote commands with the name of the host. That makes
determining which host is having issues easier when run with
--concurrency > 1

refs #16220

Arvados-DCO-1.1-Signed-off-by: Ward Vandewege <ward@jhvc.com>