journalctl: fix when --since, --until and --lines are used altogether

journalctl: fix when --since, --until and --lines are used altogether

This is a follow-up for #26669 (81fb5375b3b3bfc22d023d7908ad9eee4b3c1ffb).

After the mentioned commit, we stopped checking if the
entry is within the range of --until if --lines is used.

However, when --since, --until and --lines=N are used
altogether, and the number of lines between --since
and --until is smaller than N, we would seek to --since
later (f58269510727964cb5c10e7d2f9849c442ea1f80).
This breaks the assumption that if --lines is set,
the boundary is never exceeded because the counter of
outputs gets us covered.