[FIX] purchase: select supplier
[FIX] purchase: select supplier

When a PO is created through the resolution of a procurement, the first
supplier of the list is automatically chosen. This is hardcoded and
cannot be extended.

We add a hook so it's possible to customize the selection of the
supplier, for example by selecting the one who offers the best price.

opw-726309

hip-odoo/odoo,hip-odoo/odoo,ygol/odoo,ygol/odoo,hip-odoo/odoo,hip-odoo/odoo,ygol/odoo,ygol/odoo,hip-odoo/odoo,ygol/odoo,ygol/odoo,hip-odoo/odoo,ygol/odoo