[FIX] delivery: Translate the delivery method on SO line

In this way the name of a delivery method can be translated on a SO line.
Inspired from function 'product_id_change' in model 'sale.order.line' where
the description of a SO line must be in the language of the partner.

opw:1849656

addons/delivery/i18n/delivery.pot

@@ -377,6 +377,7 @@ msgid "Fixed Price"
 msgstr ""
 
 #. module: delivery
+#: model:delivery.carrier,name:delivery.free_delivery_carrier
 #: model:product.product,name:delivery.product_product_delivery
 #: model:product.template,name:delivery.product_product_delivery_product_template
 msgid "Free delivery charges"
@@ -559,6 +560,7 @@ msgid "No price rule matching this order; delivery cost cannot be computed."
 msgstr ""
 
 #. module: delivery
+#: model:delivery.carrier,name:delivery.normal_delivery_carrier
 #: model:product.product,name:delivery.product_product_delivery_normal
 #: model:product.template,name:delivery.product_product_delivery_normal_product_template
 msgid "Normal Delivery Charges"
@@ -759,6 +761,7 @@ msgid "Stock Move"
 msgstr ""
 
 #. module: delivery
+#: model:delivery.carrier,name:delivery.delivery_carrier
 #: model:product.product,name:delivery.product_product_delivery_poste
 #: model:product.template,name:delivery.product_product_delivery_poste_product_template
 msgid "The Poste"

addons/delivery/models/delivery_carrier.py

@@ -33,7 +33,7 @@ class DeliveryCarrier(models.Model):
     # Internals for shipping providers #
     # -------------------------------- #
 
-    name = fields.Char(required=True)
+    name = fields.Char(required=True, translate=True)
     active = fields.Boolean(default=True)
     sequence = fields.Integer(help="Determine the display order", default=10)
     # This field will be overwritten by internal shipping providers by adding their own type (ex: 'fedex')

addons/delivery/models/sale_order.py

@@ -89,10 +89,9 @@ class SaleOrder(models.Model):
             taxes_ids = self.fiscal_position_id.map_tax(taxes, carrier.product_id, self.partner_id).ids
 
         # Create the sales order line
-        carrier_name = carrier.product_id.with_context(lang=self.partner_id.lang).name_get()[0][1]
         values = {
             'order_id': self.id,
-            'name': carrier_name,
+            'name': carrier.with_context(lang=self.partner_id.lang).name,
             'product_uom_qty': 1,
             'product_uom': carrier.product_id.uom_id.id,
             'product_id': carrier.product_id.id,