fix key_state_gen_auth_control_files probably checking file creation

fix key_state_gen_auth_control_files probably checking file creation

When the auth_failed_reason_file was added, it was forgotten to also add it
to the conditions that determine if the file creation was successful.

Reported-by: Joshua Rogers <contact@joshua.hu>
Found-by: ZeroPath (https://zeropath.com/)
Change-Id: I94d2bdd234a1c416b78924d044bf7e57f1bed8c4
Signed-off-by: Arne Schwabe <arne@rfc2549.org>
Acked-by: Gert Doering <gert@greenie.muc.de>
Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1327
Message-Id: <20251030193940.1295-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg34067.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>