[llvm] [llvm-objdump] Rework .gnu.version_d dumping (PR #128434)

[James Henderson via llvm-commits]

https://github.com/jh7370 approved this pull request.

Did you mean to include the `verdef-section.yaml` changes? If so, the test is failing.

Everything else LGTM, so I'm assuming it was an accidental addition and am approving without it. If it is intended, please let me know and I'll take another look (after it's fixed).

https://github.com/llvm/llvm-project/pull/128434