[FIX] account: Invoice Analysis

- Go to Accounting > Reports > Invoices
- Go to the pivot view
- Enable 'Total' and 'Untaxed Total' in the measures

The Total is wrong.

`amount_total` is retrieved on the invoice, unlike the subtotal which is
retreved on the invoice line. We apply the same logic than
`residual_company_signed`.

opw-1950663

closes odoo/odoo#31991

Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>

addons/account/report/account_invoice_report.py

@@ -114,7 +114,8 @@ class AccountInvoiceReport(models.Model):
                     ai.partner_bank_id,
                     SUM ((invoice_type.sign_qty * ail.quantity) / u.factor * u2.factor) AS product_qty,
                     SUM(ail.price_subtotal_signed * invoice_type.sign) AS price_total,
-                    SUM(ai.amount_total * invoice_type.sign) AS amount_total,
+                    (ai.amount_total * invoice_type.sign) / (SELECT count(*) FROM account_invoice_line l where invoice_id = ai.id) *
+                    count(*) * invoice_type.sign AS amount_total,
                     SUM(ABS(ail.price_subtotal_signed)) / CASE
                             WHEN SUM(ail.quantity / u.factor * u2.factor) <> 0::numeric
                                THEN SUM(ail.quantity / u.factor * u2.factor)