Add new text key admin.order.edit.additional_tax_included_in_price
Add spec file for additional tax display. Add new trait for enterprise fee and calculator factory
When tax are included in price, voucher tax is stored in the voucher
adjustment and not as its own adjustment. So we add a "fake adjustment"
for display purposes.
The removed test here was checking for adjustments that have an amount of zero and are eligible. If the amount is zero, it will already be marked as ineligible.
