integrationtest: use cp instead of shutil_cp_al
integrationtest: use cp instead of shutil_cp_al

Build.gnome.org give shutil_cp_al gives:
Cannot copy gtk+_treeview.test: Gio.IOErrorEnum: Operation not permitted
which we can't reproduce locally

Let's try using internal copy

chergert/gnome-continuous,vrutkovs/vrutkovs.github.io,chergert/gnome-continuous,vrutkovs/vrutkovs.github.io,chergert/gnome-continuous,vrutkovs/vrutkovs.github.io