[lld] [LLD][COFF] Avoid forcing lazy symbols in loadMinGWSymbols during symbol table enumeration (PR #141593)

[Jacek Caban via llvm-commits]

cjacek wrote:

This issue can also be reproduced with ARM64EC DLL imports. `DLLFile::parse()`, even with #141587, does not include all the symbols that `ImportFile::parse()` does, it omits `__auximpcopy_` and `__impchk_`. While we could consider defining them in `DLLFile::parse()` as well, that's not how real import libraries behave; they also skip these symbols in the archive map, so they are only defined if the import file is pulled in by other means.

Since the problem is reproducible with the attached test case too, I went ahead and fixed it in `SymbolTable::loadMinGWSymbols` instead.

https://github.com/llvm/llvm-project/pull/141593