config: CMAKE_ARGS already supported by scikit-build

The setup.py in OpenCV-Python manually checks for `CMAKE_ARGS`, and places that in the `cmake_args=` setup keyword. Scikit-build itself does this, and also does some post-processing on CMAKE_ARGS that is missing here, including stripping `CMAKE_INSTALL_PREFIX`, which cannot be set by projects. The recent (a few hours ago) 0.17.0 release of scikit-build now produces an error if it detects CMAKE_INSTALL_PREFIX in `cmake_args=` (since it should not be passed in), but it ignores CMAKE_ARGS (since that get set lots of places like Conda).



The ideal fix would be to require scikit-build 0.14+, another fix would be to duplicate the filtering code in scikit-build: https://github.com/scikit-build/scikit-build/blob/6df6d571ba5c7be03729dd6b4d5e543c8aaae781/skbuild/setuptools_wrap.py#L545.



Seen in https://github.com/pyodide/pyodide/issues/3753. That was easy to fix, but it's likely going to hit (at least) conda builds.



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