Introduce ClHHP headers version

[ilya-lavrenov]

OpenCL CLHPP headers don't have any version information inside them. E.g. the package itself is released as v2024.10.24, but how can I extract this information from headers?

Sometimes, we need to write conditional code which depends on availability of some C++ OpenCL API, but it's impossible to do it, because headers don't have version information.