[FIX] sale: All salespersons appearing in sale order

Current behavior:
In a multicompany environement when you create a sale order and go into other info tab
you could see all the salesperson in the Saleperson field even if they were not part of the selected company.

Steps to reproduce:
-Get in a multicompany environement
-Create a saleorder
-Go in other info tab

opw-2714085

closes odoo/odoo#81991

Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com>