[clang] [libclang/python] export libclang version to the bindings (PR #86931)

[Vlad Serebrennikov via cfe-commits]

Endilll wrote:

Release note should be added here: https://github.com/llvm/llvm-project/blob/3fdec1c9f9469587de24a525b48aa6ceddc392f5/clang/docs/ReleaseNotes.rst#L525

Tests are in `clang/bindings/python/tests`.

Either should be accessible to you.

https://github.com/llvm/llvm-project/pull/86931