[FIX] account_edi_ubl_cii: use the VAT for the PartyTaxScheme/CompanyID

Node `/cac:Party/cac:PartyTaxScheme/cbc:CompanyID` should be filled with
the VAT rather than the Peppol Endpoint.

Otherwise, a Peppol Bis 3 validator will raise:

"[BR-CO-09]-The Seller VAT identifier (BT-31), the Seller tax
representative VAT identifier (BT-63) and the Buyer VAT identifier
(BT-48) shall have a prefix in accordance with ISO code ISO 3166-1
alpha-2 by which the country of issue may be identified. Nevertheless,
Greece may use the prefix ‘EL’."

opw-3589263

closes odoo/odoo#142487

X-original-commit: f06535e99f4735407c1b9808bb6acd9596726872
Signed-off-by: Florian Gilbert (flg) <flg@odoo.com>
Signed-off-by: Julien Van Roy (juvr) <juvr@odoo.com>

addons/account_edi_ubl_cii/models/account_edi_xml_ubl_bis3.py

@@ -61,9 +61,6 @@ class AccountEdiXmlUBLBIS3(models.AbstractModel):
             if partner.country_id.code == "AU" and partner.vat and not partner.vat.upper().startswith("AU"):
                 vals['company_id'] = "AU" + partner.vat
 
-            if partner.country_id.code == "LU" and 'l10n_lu_peppol_identifier' in partner._fields and partner.l10n_lu_peppol_identifier:
-                vals['company_id'] = partner.l10n_lu_peppol_identifier
-
         # sources:
         #  https://anskaffelser.dev/postaward/g3/spec/current/billing-3.0/norway/#_applying_foretaksregisteret
         #  https://docs.peppol.eu/poacc/billing/3.0/bis/#national_rules (NO-R-002 (warning))