Fix MBEDTLS_DEPRECATED_REMOVED build errors

Fix MBEDTLS_DEPRECATED_REMOVED build errors

This commit allows compiling OpenVPN with recent versions of mbed TLS
if MBEDTLS_DEPRECATED_REMOVED is defined.

Cherry-pick note:
- Adapt to still support TLS 1.0 and 1.1 which were removed in
  master.

Change-Id: If96c2ebd2af16b18ed34820e8c0531547e2076d9
Signed-off-by: Max Fillinger <maximilian.fillinger@foxcrypto.com>
Acked-by: Arne Schwabe <arne-openvpn@rfc2549.org>
Message-Id: <20240618120127.4564-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg28771.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
Acked-by: Gert Doering <gert@greenie.muc.de>
(cherry picked from commit 8eb397de3656402872f9c9584c6f703b87b50762)
Message-Id: <20250429154923.20921-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/search?l=mid&q=20250429154923.20921-1-gert@greenie.muc.de
Signed-off-by: Gert Doering <gert@greenie.muc.de>