[llvm] [AsmPrinter][DebugNames] Implement DW_IDX_parent entries (PR #77457)

[Felipe de Azevedo Piovezan via llvm-commits]

felipepiovezan wrote:

> > added test as suggested by @ayermolo I believe we're looking good to merge now?
> 
> The above forward declarations should _not_ end up in the name lookup as that will violate the DWARF spec. 

As I mentioned in the comment, this is not related to any of the IDX_Parent work; it happens in baseline LLVM as well.
I believe it is a bug that just got fixed in https://github.com/llvm/llvm-project/pull/77511

https://github.com/llvm/llvm-project/pull/77457