LU-17512 utils: new ? operator for jobid_name

LU-17512 utils: new ? operator for jobid_name

Added new ? operator when setting the jobid_name. The intended use
is: "jobid_name=%j?%H" This will use the jobid if it is available
and otherwise uses the short hostname.

Signed-off-by: Maximilian Dilger <mdilger@whamcloud.com>
Change-Id: I418860fce5a81aa8a0a0a43c2d8bdb6d107779f9
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/55332
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Thomas Bertschinger <bertschinger@lanl.gov>