[llvm] [llvm-debuginfo-analyzer] Add support for DW_AT_GNU_template_name. (PR #115724)

[Stephen Tozer via llvm-commits]

https://github.com/SLTozer commented:

Would the full `{TemplateTemplate}` line be printed before this patch, or has the output there changed? If the latter, then I think a test should be added for that output as well; otherwise this LGTM.

https://github.com/llvm/llvm-project/pull/115724