[FIX] sale_layout: unify tax displayed field in report

Use the same logic to display taxes as in the default report:
use the tax description and fallback on the name

Already done in report_invoice_document and report_saleorder_document

Closes #14906

addons/sale_layout/views/report_invoice_layouted.xml

@@ -22,7 +22,7 @@
                         <span t-field="l.discount"/>
                     </td>
                     <td>
-                        <span t-esc="', '.join(map(lambda x: x.name, l.invoice_line_tax_ids))"/>
+                        <span t-esc="', '.join(map(lambda x: (x.description or x.name), l.invoice_line_tax_ids))"/>
                     </td>
                     <td class="text-right">
                         <span t-field="l.price_subtotal" 

addons/sale_layout/views/report_quotation_layouted.xml

@@ -24,7 +24,7 @@
                                 <span t-field="l.discount"/>
                             </td>
                             <td class="text-right">
-                                <span t-esc="', '.join(map(lambda x: x.name, l.tax_id))"/>
+                                <span t-esc="', '.join(map(lambda x: (x.description or x.name), l.tax_id))"/>
                             </td>
                             <td class="text-right">
                                 <span t-field="l.price_subtotal"