GHA: collect more artifacts for mingw builds

GHA: collect more artifacts for mingw builds

Collect also binaries for openvpnserv, tapctl and openvpnmsica.

Change-Id: Iaebc46f9156657128dc52c979202545be8865656
Signed-off-by: Lev Stipakov <lev@openvpn.net>
Acked-by: Frank Lichtenheld <frank@lichtenheld.com>
Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1200
Message-Id: <20250918135908.14364-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg33058.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
(cherry picked from commit 8465972b00bef5230d3ec36baedf56952448443f)