[FIX] web: properly right-align numbers in grouped list views' rows

The 'oe_number' class was replaced by 'o_list_number' but this was not
properly done for grouped list views. As a fix, the new class is added
on top of the old one to not break potential customizations.

Proper fix will be done in master.
See https://github.com/odoo/enterprise/commit/a2ce226a2a085b26174cdfd32922517dff39658c

Closes https://github.com/odoo/odoo/pull/23966

addons/web/static/src/js/views/list_view.js

@@ -1431,7 +1431,7 @@ ListView.Groups = Class.extend({
                     } else if (column.id in group.aggregates) {
                         var r = {};
                         r[column.id] = {value: group.aggregates[column.id]};
-                        $('<td class="oe_number">')
+                        $('<td class="oe_number o_list_number">')
                             .html(column.format(r, {process_modifiers: false}))
                             .appendTo($row);
                     } else {