[FIX] account_bank_statement_import: correct fill in of bank account

When importing bank statements, we are filling in automatically the bank account
id if an existing record matching the number is found. However, we should restrict
the search to retrieve only bank accounts belonging to the current company,
otherwise it will create a multi-company inconsistency.

closes odoo/odoo#78979

X-original-commit: f22eb970
Signed-off-by: Olivier Colson <oco@odoo.com>

addons/account_bank_statement_import/account_bank_statement_import.py

@@ -203,7 +203,8 @@ class AccountBankStatementImport(models.TransientModel):
                     # reconciliation process will be linked to the bank when the statement is closed.
                     identifying_string = line_vals.get('account_number')
                     if identifying_string:
-                        partner_bank = self.env['res.partner.bank'].search([('acc_number', '=', identifying_string)], limit=1)
+                        partner_bank = self.env['res.partner.bank']\
+                            .search([('acc_number', '=', identifying_string), ('company_id', 'in', (False, journal.company_id.id))], limit=1)
                         if partner_bank:
                             line_vals['bank_account_id'] = partner_bank.id
                             line_vals['partner_id'] = partner_bank.partner_id.id