[IMP] account: avoid fetching debit, credit in aged partner balance

Perform fetching, using `read` or `_read_from_database` on matched debit
and credit takes a huge amount of time, if there are too many acml being
processed. Delay fetching to `mapped` improve the performance greatly.

closes odoo/odoo#75969

Signed-off-by: Quentin De Paoli (qdp) <qdp@openerp.com>

addons/account/report/account_aged_partner_balance.py

@@ -128,9 +128,9 @@ class ReportAgedPartnerBalance(models.AbstractModel):
             # which look up the cache to determine the records to read, and has
             # quadratic complexity when the number of records is large...
             move_lines = self.env['account.move.line'].browse(aml_ids)
-            move_lines.read(['partner_id', 'company_id', 'balance', 'matched_debit_ids', 'matched_credit_ids'])
-            move_lines.mapped('matched_debit_ids').read(['max_date', 'company_id', 'amount'])
-            move_lines.mapped('matched_credit_ids').read(['max_date', 'company_id', 'amount'])
+            move_lines._read_from_database(['partner_id', 'company_id', 'balance'])
+            move_lines.mapped('matched_debit_ids')._read_from_database(['max_date', 'company_id', 'amount'])
+            move_lines.mapped('matched_credit_ids')._read_from_database(['max_date', 'company_id', 'amount'])
             for line in move_lines:
                 partner_id = line.partner_id.id or False
                 if partner_id not in partners_amount: