[clang] Recognize friend operator != to fix ambiguity with operator== (PR #70217)

[Utkarsh Saxena via cfe-commits]

usx95 wrote:

Thanks @zygoloid for filing the core issue https://cplusplus.github.io/CWG/issues/2804.html

Would it make sense to go forward with this change and fix rewrite targets for friend operators (as a clang extension)?



https://github.com/llvm/llvm-project/pull/70217