[feature] Port `stdcpp_library()` to conan v2

[SpaceIm]

• [x] I've read the CONTRIBUTING guide.

There are 47 recipes in conan-center relying on stdcpp_library() (mainly to append C++ standard lib to system_libs in package_info() for C++ static libs with C API).

[SSE4]

that might be better to change UX in v2 to return a list of libraries, just in case. on certain platforms, several libraries might be required in future (libc++, libc++abi, libsupc++, libc++fs, atomic and so on).