[FIX] account, l10n_in: amount by group base when overriden

Fine tuning of 7bea9126
In india there are as many tax lines on an invoices as there are
repartition lines (classic) * products

So, before this commit, preventing adding the base if tax was already seen
was not enough, the base was still added many times

After this commit, hopefully, the based on amount is correct for each tax

Forward port of #37390

closes odoo/odoo#37784

Signed-off-by: Lucas Perais (lpe) <lpe@odoo.com>