[llvm] [NFC] Separate UnwindTable from DebugFrame into a different type (PR #142521)

[Paul Kirth via llvm-commits]

https://github.com/ilovepi commented:

As in the other review, the C++ refactoring looks fine since its mostly mechanical, but this change is a decision code owners need to weigh in on. Fuller description of the change, rationale, and intended future work would go a long way to make the case for the refactor.

https://github.com/llvm/llvm-project/pull/142521