[BUG] prefab should set LINKER_LANGUAGE property for static libraries about prefab HOT 3 OPEN

I suspect this is a trivial fix since the abi.json already describes the STL requirement.

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As an aside, it would also be useful to check inside the SDL2Config.cmake config file whether the CXX language is actually enabled.
Because if it is not, the build process will fail at a later time.
See e.g. this issue I created earlier this year.

I think the cmake config file might need something like:

include(CheckLanguage)
check_language(CXX)
if(NOT CMAKE_CXX_COMPILER)
    message(WARNING "SDL2 requires CXX, but it not enabled.")
endif()

CheckLanguage documentation

Or skip the warning and do enable_language(CXX) yourself.

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I think, instead of LINKER_LANGUAGE, the imported targets should set IMPORTED_LINK_INTERFACE_LANGUAGES.

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