[lld] [LLD][COFF] Allow overriding EC alias symbols with alternate names (PR #113456)

[Jacek Caban via llvm-commits]

cjacek wrote:

I just noticed that we may need special-casing `func`->`#func` aliases. It needs more testing, I changed it to a draft for now.

https://github.com/llvm/llvm-project/pull/113456