[FIX] l10n_ch: change the address format to standard

Steps to reproduce:
1- install swiss localization
2- create a QR bill

Bug:
the addresses contain the field `o.company_id.country_id.code` which is
not the standard of the swiss QR bill

fix:
remove the field

opw-3395089

closes odoo/odoo#127215

Signed-off-by: Mohamed Megahed Abbas Megahed SALLAM (mome) <mome@odoo.com>