[lld] [llvm] [NFCI][LTO][lld] Optimize away symbol copies within LTO global resolution in ELF (PR #106193)

[Teresa Johnson via llvm-commits]

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

I think this needs an update after #106670 being merged? I don't have a strong feeling on the wrapper class suggested by @kazutakahirata but lgtm otherwise with a small suggestion below.

https://github.com/llvm/llvm-project/pull/106193