[clang] [clang-tools-extra] [compiler-rt] [libcxx] [lld] [lldb] [llvm] [mlir] Fix SyntaxWarning messages from python 3.12 (PR #86806)

[Louis Dionne via llvm-commits]

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

Libc++ parts LGTM.

https://github.com/llvm/llvm-project/pull/86806