[llvm] [gold] Add a new `-plugin-opt` to enable `MCTargetOptions::AsmVerbose` (PR #71606)

[Teresa Johnson via llvm-commits]

https://github.com/teresajohnson commented:

I see that lld enables this unconditionally: https://github.com/llvm/llvm-project/blob/26ab444e88fc8fdd554e5a9381a68b7b5e63b6fd/lld/ELF/LTO.cpp#L156

How about just make it unconditionally true to be consistent and avoid adding another plugin option?

https://github.com/llvm/llvm-project/pull/71606