[llvm] [DebugInfo][DWARF] Add heapallocsite information (PR #132073)

[J. Ryan Stinnett via llvm-commits]

jryans wrote:

> ping - did I create this pull request correctly, or should I be CCing someone other than @JDevlieghere ?

I believe people are just generally overstretched in this area... I've added a few others who may have opinions here as well.

https://github.com/llvm/llvm-project/pull/132073