[clang] [clang][Itanium Mangle] Enable mangling of enclosing class for member… (PR #110503)

[Haojian Wu via cfe-commits]

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

Thank you, this looks good to me. Let’s wait for a bit to see if other reviewers have any additional comments.

https://github.com/llvm/llvm-project/pull/110503