[FIX] res_partner: add index on commercial_partner_id
[FIX] res_partner: add index on commercial_partner_id

This commit closes #13716

ygol/odoo,storm-computers/odoo,laslabs/odoo,bplancher/odoo,ygol/odoo,Elico-Corp/odoo_OCB,ygol/odoo,Elico-Corp/odoo_OCB,laslabs/odoo,microcom/odoo,hip-odoo/odoo,microcom/odoo,ygol/odoo,dfang/odoo,hip-odoo/odoo,dfang/odoo,dfang/odoo,storm-computers/odoo,ygol/odoo,Elico-Corp/odoo_OCB,storm-computers/odoo,storm-computers/odoo,hip-odoo/odoo,storm-computers/odoo,microcom/odoo,bplancher/odoo,Elico-Corp/odoo_OCB,dfang/odoo,hip-odoo/odoo,Elico-Corp/odoo_OCB,microcom/odoo,microcom/odoo,laslabs/odoo,hip-odoo/odoo,bplancher/odoo,ygol/odoo,microcom/odoo,Elico-Corp/odoo_OCB,laslabs/odoo,bplancher/odoo,ygol/odoo,hip-odoo/odoo,storm-computers/odoo,bplancher/odoo,laslabs/odoo,dfang/odoo,bplancher/odoo,laslabs/odoo,dfang/odoo