tests/kola: fix early error in upgrade test

In some older versions of FCOS `systemctl status foo.service` would
output an error if foo.service wasn't active. Let's account for this
by adding an `|| true` so our script doesn't exit with an error here.

tests/kola/upgrade/extended/test.sh

@@ -389,5 +389,7 @@ systemd-run -u refchanged                      \
 # While we wait, loop to show status of zincati and rpm-ostreed
 while true; do
     sleep 30
-    systemctl status rpm-ostreed zincati --lines=0
+    # Ignore error here. Older systemd (~F32) errors here if one of
+    # the services isn't active.
+    systemctl status rpm-ostreed zincati --lines=0 || true
 done