[llvm] [DWARFLinker] Update `stmt-seq-macho.test` to use `update_test_body.py` (PR #133363)

[Jonas Devlieghere via llvm-commits]

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

Yup no concern from me. I'll give this approach a try next time I need to add a dsymutil test 👍

https://github.com/llvm/llvm-project/pull/133363