[3.13] gh-130052: Fix search_map_for_section() error handling (GH-132594) (#132598)

gh-130052: Fix search_map_for_section() error handling (GH-132594)

* Don't call close() if the file descriptor is negative.
* If close() fails, chain the existing exception.
(cherry picked from commit 014c7f90478780b18d0e33d456483178c8dcc665)

Co-authored-by: Victor Stinner <vstinner@python.org>