Fix file descriptor leak on error in async FDW

When Who What
2023-11-23 11:35:59 Heikki Linnakangas (heikki) Closed in commitfest 2024-01 with status: Committed
2023-11-23 11:35:59 Heikki Linnakangas (heikki) Changed committer to heikki
2023-11-15 22:50:06 Heikki Linnakangas (heikki) Changed authors to Heikki Linnakangas (heikki)
2023-11-15 22:50:06 Heikki Linnakangas (heikki) Changed targetversion to stable
2023-11-15 22:49:51 Heikki Linnakangas (heikki) Attached mail thread 472235.1678387869@sss.pgh.pa.us
2023-11-15 22:49:51 Heikki Linnakangas (heikki) Created patch record