[FIX] account_invoice: use tax groups correctly

With the previous fix, tax groups would not work correctly when checking
if a tax affected a subsequent tax.
With this fix, all taxes that are not of amount_type group are aggregated
before following the normal flow.

opw-2497281

closes odoo/odoo#76855

Signed-off-by: oco-odoo <oco-odoo@users.noreply.github.com>