LU-17343 utils: added --path option for lctl list_param

LU-17343 utils: added --path option for lctl list_param

Added 'lctl list_param [-p] PARAM' option that prints the
actual pathname(s) for PARAM instead of the parameter names(s).
This should allow users to "resolve" PARAM pathnames so that they
can be used directly, which avoids having to hard code them. Also
renamed "po_only_path" and "po_show_path" to be "po_only_name" and
"po_show_name" to avoid confusion with "po_only_pathname" for the new
option.

Signed-off-by: Frederick Dilger <fdilger@whamcloud.com>
Change-Id: I2259b930f3ac5cc46ac7a9a36218a44fa110157c
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/55202
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>