[lld] [LLD] [MinGW] Implement --dependent-load-flag option (PR #113814)

[Mateusz Mikuła via llvm-commits]

mati865 wrote:

> And as high level view of what it does - this sets one value in the `_load_config_used` struct, if such a symbol happens to be found at link time, right?

Yeah, that's how I understand it. Which means it has an effect only when using Control Flow Guard is enabled.

https://github.com/llvm/llvm-project/pull/113814