[FIX] sale: customized invoices

In Sale settings, enable "Personalize the sales orders and invoice
report..." and also "Show line subtotals with taxes included (B2C)".
Print an invoice ==> traceback.

This is because the field `price_total` doesn't exist on an invoice
line. Note that this field exists on a SO line.

opw-694438

addons/sale/report/invoice_report_templates.xml

@@ -15,7 +15,6 @@
                         <th t-if="display_discount" class="text-right" groups="sale.group_discount_per_so_line">Disc.(%)</th>
                         <th class="text-right">Taxes</th>
                         <th class="text-right" groups="sale.group_show_price_subtotal">Price</th>
-                        <th class="text-right price_tax_included" groups="sale.group_show_price_total">Total Price</th>
                     </tr>
                 </thead>
                 <tbody class="invoice_tbody">
@@ -50,10 +49,6 @@
                                     <span t-field="l.price_subtotal"
                                         t-options='{"widget": "monetary", "display_currency": o.currency_id}'/>
                                 </td>
-                                <td class="text-right" groups="sale.group_show_price_total">
-                                    <span t-field="l.price_total"
-                                        t-options='{"widget": "monetary", "display_currency": o.currency_id}'/>
-                                </td>
                             </tr>
                         </t>