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

[AmirHossein PashaeeHir via llvm-commits]

amsen20 wrote:

@dwblaikie
@igorkudrin

I moved all the printing logic to `UnwindTablePrinter`. Through the way, I have added a couple of accessor methods.
Please check the code again.

To make the reviewing process, I first moved the `UnwindTable` to the low-level library in this [commit](https://github.com/llvm/llvm-project/pull/142521/commits/1ed0df26166199c0081f54b06f4d606f34c01834) and then separated the printing logic.

Thanks.

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