[clang] [clang][python] Add CLANG_DISABLE_RUN_PYTHON_TESTS CMake option to disable clang python bindings tests (PR #111367)

[Jannick Kremer via cfe-commits]

https://github.com/DeinAlptraum approved this pull request.

LGTM, but I'd like @Endilll to take a look as well, since I'm not that familiar with our build infrastructure & cmake

https://github.com/llvm/llvm-project/pull/111367