Make cert_data.h and test_cryptoapi/pkcs11.c MSVC compliant

Make cert_data.h and test_cryptoapi/pkcs11.c MSVC compliant

- Do not use non-literal initializers for static objects
- Replace empty initializer {} by {0}

Change-Id: Ifb961a4df2b8b8300633192e1a268669f6f41a35
Signed-off-by: Selva Nair <selva.nair@gmail.com>
Acked-by: Heiko Hund <heiko@openvpn.net>
Acked-by: Selva Nair <selva.nair@gmail.com>
Acked-by: Lev Stipakov <lstipakov@gmail.com>
Co-authored-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Frank Lichtenheld <frank@lichtenheld.com>
Message-Id: <20230922160405.167057-1-frank@lichtenheld.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg27084.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>