[clang] Retrieve BinaryOperator::getOpcode and BinaryOperator::getOpcodeStr via libclang and its python interface (PR #98489)

[Vlad Serebrennikov via cfe-commits]

https://github.com/Endilll commented:

I think this should be rebased on top of #95608 once it lands (soon).
CC @DeinAlptraum 

https://github.com/llvm/llvm-project/pull/98489