[IMP] sale_*: clean order line name computation

* make sure full content is translated in partner language
* drop useless product param (use line product_id field instead)
* delegate order lines name computation to computes for ecommerce carts

closes odoo/odoo#82620

Related: odoo/enterprise#23432
Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>