[FIX] account: cash basis reconciliation almost all amount

In multicurrency

Do an invoice with cash basis lines in the foreign currency
Make a payment for almost all the invoice
"almost" refers to the point where virtually all taxes will be paid

i.e., paying 90 over 100, that contains a tax of 5%
The tax paid will be an amount almost equal (to a few cents) to the
total amount of the tax
It is not negligible, but if the currency rates are in the right configuration
(i.e. 0.005888)

Before this commit: the Cash Basis reconciliation will be considered as full and will trigger
the creation of the Exchange Diff Entry.
In turn, paying the rest of the invoice will pop up an error saying that some entries are already reconciled
(with the Exchange Diff entry)
It is not *that* that an exchange rate entry has been created the first time
after all, a percentage sufficiently close to 100 has been paid
But it blocks subsequent reconciliation, hence this fix

After this commit, if the cash basis entry doesn't match at least 100% of the paid move
then, we force to not check for full reconciliation

OPW 1953027
closes #31168

closes odoo/odoo#32023

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