scripts: Disable terminate-psql-sessions ON_ERROR_STOP for now.

This appears to fail nondeterministically in CI; there's likely a
better fix but this should let us get CI happy again.

scripts/setup/terminate-psql-sessions

@@ -26,6 +26,6 @@ root)
     ;;
 esac
 
-"${psql[@]}" -v ON_ERROR_STOP=1 <<EOF
+"${psql[@]}" <<EOF
 SELECT pg_terminate_backend(pid) FROM pg_stat_activity WHERE datname IN ($tables);
 EOF