testsuite:ps: etime/ELAPSED doesn't match full format
According to the manpage on Ubuntu 23.10 the etime/ELAPSED output can take the following format:
elapsed time since the process was started, in the form [[DD-]hh:]mm:ss.
We're not currently accouting for the [DD-]
part, which makes this test
fail inside an Ubuntu 24.04 LXD container running on a Ubuntu 23.10 host.
$ lxc shell nn
root@nn:~# ps -o bsdtime,cputime,etime,etimes
TIME TIME ELAPSED ELAPSED
0:00 00:00:00 441077220-02:35:44 4121967232
0:00 00:00:00 441077220-02:35:44 4121967232
0:00 00:00:00 441077220-02:35:12 4121967200
This seems to be a similiar regex mismatching issue as !170 (merged)