[REQ] [Client:C] [C-libcurl] cmake support specify paths

Created by: katepangLiu

Describe the solution you'd like

In some caces, we need to speciffy the libcurl include/libs path, not by find_package(CURL Version). So that we can put libcurl in project, ignoring the libcurl in system.

• Maunally specify libcurl paths
  • cmake -DCURL_INCLUDE_DIR=<include> -DCURL_LIBRARIES=<libs> ...
• Auto find libcurl
  • cmake ...