[FIX] point_of_sale: res.partner doesn't belong to a specific company

Steps to reproduce:

1- install POS in multicompany env
2- create a customer c from POS UI
3- c doesn't belong to the active company

Bug:
the company_id is not set when the customer is created

Fix:
set comapny_id to current active company for new customers created from
POS

OPW-2881551

closes odoo/odoo#96073

X-original-commit: 3aa03eb65d431cb9749a2b31a9a09d6b41cd34a4
Signed-off-by: Grazioso Andrea (agr) <agr@odoo.com>
Signed-off-by: Mohamed Megahed Abbas Megahed SALLAM (mome) <mome@odoo.com>

addons/point_of_sale/static/src/js/Screens/PartnerListScreen/PartnerDetailsEdit.js

@@ -60,6 +60,9 @@ odoo.define('point_of_sale.PartnerDetailsEdit', function(require) {
                 });
             }
             processedChanges.id = this.props.partner.id || false;
+            if (!this.props.partner.id) {
+                processedChanges.company_id = this.env.pos.company.id;
+            }
             this.trigger('save-changes', { processedChanges });
         }
         async uploadImage(event) {