rulez: drop gnome-autoar, nautilus and nautilus-python from the v2023_repositories list

By default gitlab-rulez defines the default branch based on the
value of current_release_branch which is currently "apertis/v2025pre".

But some packages have been dropped from Apertis in previous releases,
that means they don't have the default branch. Thus we need to teach
gitlab-rulez what is the latest branch to use as default branch.

gnome-autoar, nautilus and nautilus-python were in the v2023_repositories
list since its default branch was apertis/v2023 because it got
removed after. Now that it has been re-added in apertis/v2025pre,
gitlab-rulez can rely on the current_release_branch to define its
default branch.

Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>