[llvm] Minimal unwinding information (DWARF CFI) checker (PR #145633)

[AmirHossein PashaeeHir via llvm-commits]

amsen20 wrote:

I see the following plan fit for splitting the implementation:
- Edits to `DebugInfo` can be their own PR, they are minor as well.
- `FunctionUnitStreamer` and `FunctionUnitAnalyzer` can be moved to `llvm/MC/`, like other `MCStreamer` implementers, and they can be tested with unit testing separately.
- The remaining can stay in this PR, depending on last independent PRs.

https://github.com/llvm/llvm-project/pull/145633