[FIX] account: tax line in invoice report

Steps to reproduce:

- Accounting > Customers > Invoices > Create
- Add one product line with tax 15% and one with no tax
- Print > Invoices

Issue:

In the report, the 15% tax is applied correctly on the first
product, but the taxed amount is not displayed. This is because lines
without a tax are not being considered as a separate tax group.

Fix:

Add an additional condition in the xml to check if the amount of taxed
money is equal to the invoice value. If not, then only a part of the
invoice amount is being taxed, so it must be displayed.

can be considered a forward-port of e213dab810724985dd62fb5f9a57f2bf6686a491

opw-2945837

closes odoo/odoo#100190

X-original-commit: 51064f233ca65b98d34503e2a11481d64ae8436a
Signed-off-by: Olivier Colson (oco) <oco@odoo.com>
Signed-off-by: Stefan-Calin Crainiciuc (stcc) <stcc@odoo.com>

addons/account/views/report_invoice.xml

@@ -289,7 +289,7 @@
             -->
             <t t-foreach="tax_totals['groups_by_subtotal'][subtotal_to_show]" t-as="amount_by_group">
                 <tr>
-                    <t t-if="len(tax_totals['groups_by_subtotal'][subtotal_to_show]) > 1">
+                    <t t-if="len(tax_totals['groups_by_subtotal'][subtotal_to_show]) > 1 or (tax_totals['amount_untaxed'] != amount_by_group['tax_group_base_amount'])">
                         <td>
                             <span t-esc="amount_by_group['tax_group_name']"/>
                             <span class="text-nowrap"> on