[llvm] [DebugInfo] Use human-friendly printing for DWARF column attributes (PR #71062)

[Orlando Cazalet-Hyams via llvm-commits]

OCHyams wrote:

LGTM. It looks like the test coverage for `DW_AT_call_line` printing is incidental (i.e., testing other things, such as in `test/tools/llvm-dwarfdump/X86/verify_attr_file_indexes_no_files.yaml`. Even so, if its easy to hijack or copy a test touching  `DW_AT_call_line` so that `DW_AT_{decl/call}_column` output can be tested too then we should probably do so.

https://github.com/llvm/llvm-project/pull/71062