[FIX] sale, sale_crm: Wrong salesperson when creating SO from lead

Steps to reproduce the issue:

- Let's log in Odoo with a user U1
- Create a lead with user U2 as salesperson
- Click on New quotation

Bug:

A SO was suggested with U1 as salesperson instead of U2

opw:2520827

closes odoo/odoo#75787

Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>