[FIX] sale: Duplicate field VAT in report_invoice_document
[FIX] sale: Duplicate field VAT in report_invoice_document

Removed vat field from inherited invoice template to avoid a duplication.

opw:1903782, 1903149

closes odoo/odoo#28249
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo