[FIX] sale_mrp, sale_stock: No delivered_qty computed with partial delivery

Steps to reproduce the bug:
- Create a consumable or storable final product A with invoicing policy
in "delivered quantity"
- Create two storable products B and C
- Create a BOM kit for A with 1 B and 1 C
- Create a SO with 5 qty of A and confirm it
- Deliver 3 B and 2 C and either on "No backorder" or "With backorder"

Bug:

The delivered_qty on the SO line is of course not automatically updated
(as in this case, a right value is not computable) but the delivered_qty
was not updatable  manually and then it was possible to invoice the SO.

Co-authored-by: nim-odoo <nim@odoo.com>

DO NOT FORWARD-PORT

opw:1966170

closes odoo/odoo#32583

Signed-off-by: Simon Goffin (sig) <sig@openerp.com>

addons/sale_mrp/models/sale_mrp.py

@@ -24,6 +24,16 @@ class SaleOrderLine(models.Model):
                 return 0.0
         return super(SaleOrderLine, self)._get_delivered_qty()
 
+    @api.multi
+    def _compute_qty_delivered_updateable(self):
+        lines = self.env['sale.order.line']
+        for line in self:
+            bom = self.env['mrp.bom']._bom_find(product=line.product_id, company_id=line.company_id.id)
+            if bom and bom.type == 'phantom' and line.order_id.state == 'sale':
+                line.qty_delivered_updateable = True
+                lines |= line
+        super(SaleOrderLine, self - lines)._compute_qty_delivered_updateable()
+
     @api.multi
     def _get_bom_component_qty(self, bom):
         bom_quantity = self.product_uom._compute_quantity(1, bom.product_uom_id)