Fix CSV import with run_convert API
Improvements from https://lab.nexedi.com/nexedi/cloudooo/-/merge_requests/18 were not used when using the legacy API that ERP5 uses in convertToBaseFormat
Improvements from https://lab.nexedi.com/nexedi/cloudooo/-/merge_requests/18 were not used when using the legacy API that ERP5 uses in convertToBaseFormat