[FIX] base: impossible to change contact name format

- Create a sales order for a company with a contact name.
- Click the Preview button.
- The company and contact names appear on the same line, only separated by a
comma.

Before this commit:

it's not possible to easily override this behavior.

After this commit:

it's possible to override `Partner._get_contact_name` to change the format of
contact name.

Beware that this method is used in `_get_name` which is called from various
places. A check on the context may be necessary.

closes odoo/odoo#38712

Opw: 2077294
X-original-commit: 0b8f3f93a2cb05cc9c940964fe80acd23b86b8a0
Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>

odoo/addons/base/models/res_partner.py

@@ -615,6 +615,9 @@ class Partner(models.Model):
                 'target': 'new',
                 'flags': {'form': {'action_buttons': True}}}
 
+    def _get_contact_name(self, partner, name):
+        return "%s, %s" % (partner.commercial_company_name or partner.sudo().parent_id.name, name)
+
     def _get_name(self):
         """ Utility method to allow name_get to be overrided without re-browse the partner """
         partner = self
@@ -624,7 +627,7 @@ class Partner(models.Model):
             if not name and partner.type in ['invoice', 'delivery', 'other']:
                 name = dict(self.fields_get(['type'])['type']['selection'])[partner.type]
             if not partner.is_company:
-                name = "%s, %s" % (partner.commercial_company_name or partner.sudo().parent_id.name, name)
+                name = self._get_contact_name(partner, name)
         if self._context.get('show_address_only'):
             name = partner._display_address(without_company=True)
         if self._context.get('show_address'):