[clang] [llvm] [clang][python][test] Move python binding tests to lit framework (PR #142948)

[Jannick Kremer via cfe-commits]

DeinAlptraum wrote:

I agree, this might be the easier way. Sounds good to me.
Could you resolve the conflict so we can also confirm that the CI runs as usual?

https://github.com/llvm/llvm-project/pull/142948