CryptoPkg/Library/BaseCryptLib: Update internal functions/variables

CryptoPkg/Library/BaseCryptLib: Update internal functions/variables

* Update BaseCryptLib internal worker functions to be 'STATIC'
* Update BaseCryptLib internal working functions to not use EFIAPI
* Add GLOBAL_REMOVE_IF_UNREFERENCED to BaseCryptLib global variables

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Xiaoyu Lu <xiaoyu1.lu@intel.com>
Cc: Guomin Jiang <guomin.jiang@intel.com>
Cc: Christopher Zurcher <christopher.zurcher@microsoft.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>