Fixed an issue where subscription line subtotals were displaying incomplete tax information on the customer portal. When subscriptions contained sections, the subtotal now correctly shows both tax-included and tax-excluded amounts, providing customers with accurate pricing details.

When subscription lines had sections, subtotal
was showing only value without tax. Now it
shows both tax included and excluded subtotal.

task-3218286

Forward-Port-Of: odoo/enterprise#53219
Forward-Port-Of: odoo/enterprise#49124

This update corrects inaccurate demonstration data in the Belgian payroll accounting test module. The fix ensures that test data accurately reflects proper payroll configurations, which helps maintain the reliability of payroll processing for Belgian operations.