POSIX is unclear what state a file descriptor is in after a signal is delivered in the middle of close. On Linux, the file is closed even if it returns -1 with errno=EINTR.

As such, do not use errno at all when closing files.

PiperOrigin-RevId: 462638735
Change-Id: Ie73da1f3c83b1099bef146e1ea32e9a4818597cf