CryptoPkg/BaseCryptLib: Add MARCO to disable the deprecated MD5

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1682

MD5 is deprecated but it is required for compatible issue.
So add a MARCO for the platform to disable the usage of MD5 for
security.

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Xiaoyu Lu <xiaoyux.lu@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Siyuan Fu <siyuan.fu@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Signed-off-by: Zhichao Gao <zhichao.gao@intel.com>
Reviewed-by: Jian J Wang <jian.j.wang@intel.com>

CryptoPkg/Library/BaseCryptLib/Hash/CryptMd5.c

@@ -9,7 +9,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 #include "InternalCryptLib.h"
 #include <openssl/md5.h>
 
-
+#ifndef DISABLE_MD5_DEPRECATED_INTERFACES
 /**
   Retrieves the size, in bytes, of the context buffer required for MD5 hash operations.
 
@@ -223,3 +223,4 @@ Md5HashAll (
     return TRUE;
   }
 }
+#endif