CryptoPkg: Clean-up CRT Library Wrapper.

CryptoPkg: Clean-up CRT Library Wrapper.

Cleaning-up CRT Library Wrapper for the third-party cryptography
library building. The changes includes
1. Rename OpenSslSupport.h to CrtLibSupport.h for future alternative
   crypto provider support.
2. Remove all un-referenced CRT APIs and headers.

(NOTE: More cleans-up could be possible after OpenSSL integrate the
      extra PR request: https://github.com/openssl/openssl/pull/2961)

Cc: Ting Ye <ting.ye@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Gary Lin <glin@suse.com>
Cc: Ronald Cron <ronald.cron@arm.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Qin Long <qin.long@intel.com>
Reviewed-by: Ting Ye <ting.ye@intel.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Gary Lin <glin@suse.com>