Draft: Introduce test predicate for libdw
This MR currently has to reasons:
- Adding a test for DWARF-based backtraces as there seems to be none, yet.
- Act as a reproducer to show an issue I'm having when I try to get a DWARF-based backtrace.
The bigger scope is adding DWARF backtrace support for RISC-V (#25537), however I need to gain some confidence that it works in general (for other architectures) first.
Edited by Sven Tennie