[FIX] account: matched move lines should be marked as reconciled

Fine-tuning of https://github.com/odoo/odoo/commit/c8c3aa96e18827c3c032540b92e95b27bbed0fc3.

Also, in _prepare_reconciliation_partials, consider case of having aml without credit, debit and amount_currency.

Part-of: odoo/odoo#99537