[lld] [lld]Add lld/Common/BPSectionOrdererBase from MachO for reuse in ELF (PR #117514)

[Pengying Xu via llvm-commits]

Colibrow wrote:

I've been using the template method to implement the project, but I'm stuck. In the first version, I placed the base template in `lld/common`, and during compilation, the `lld/ELF` and `lld/MachO` templates couldn't find the symbols. I might have made a mistake in my implementation, and I'm hoping to learn how to refactor this correctly. Nice work.

https://github.com/llvm/llvm-project/pull/117514