The group 'group_discount_per_so_line' is used on reports in point_of_sale but is created in 'sale' module and point_of_sale doesn't depends on sale. So we've move this group on product to be able to properly use it in point_of_sale. TASK-ID: 2008468 closes odoo/odoo#35041 Signed-off-by: pimodoo <pimodoo@users.noreply.github.com>