[llvm] [DwarfDump] Add new set of line-table-related statistics to llvm-dwarfdump (PR #93289)

[Stephen Tozer via llvm-commits]

SLTozer wrote:

I think this is about ready to merge; only thing I couldn't do was get a proper test for tracking uniqueness across multiple CUs. I can create an IR file with multiple DICompileUnits, but that doesn't mean multiple separate compile units in the output object. I think I can't make such a test without either just committing the test object directly, or linking. Is test coverage a blocker for the patch? I don't want to commit without coverage for some functionality, but I'm not sure what the preferred approach for this is.

https://github.com/llvm/llvm-project/pull/93289