appveyor: Bump outdated links and add artifacts

appveyor: Bump outdated links and add artifacts

Bump OpenSSL.

Add release and debug configuration.

Build and add Windows installer to generated artifacts.

Build and zip prebuilt version.

Co-authored-by: Yonggang Luo <luoyonggang@gmail.com>
Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
Co-authored-by: Jinjun Gao <jinjung@vmware.com>
Signed-off-by: Jinjun Gao <jinjung@vmware.com>
Signed-off-by: Alin Gabriel Serdean <aserdean@ovn.org>
Acked-by: Ilya Maximets <i.maximets@ovn.org>