[clang] [lldb] [UBSan][BoundsSafety] Implement support for more expressive "trap reasons" (PR #154618)

[Paul Kirth via cfe-commits]

https://github.com/ilovepi commented:

LGTM from my perspective. Its worth noting that I'm not one of the normal maintainers of UBSan though. My team is just eager for this feature for our embedded/kernel users. I'll defer to @vitalybuka and @thurstond since they deal with this part of the codebase much more frequently than me.

https://github.com/llvm/llvm-project/pull/154618