[FIX] account: invoice, refund in foreign; payment, writeoff in domestic reconcile

Have an exchange rate of 1.1106

Have an invoice and a refund in a foreign currency
(amounts: 800 and 400)

Have a payment and a writeoff in domestic currency
(amounts: 200 and 160.16))

Before this commit, the invoice was not fully reconciled
even though the whole chain was
This was because, when checking if we should fully reconcile
we did so by forgetting that some members of the reconciliation
chain has a foreign currency
So, the exchange rate difference was never posted
(which amounts to 0.01 in foreign currency, and 0.00 in domestic)

After this commit, all the chain is reconciled, including the invoice

OPW 2057845

closes odoo/odoo#37417

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