WinningContextOverrides should exclude disabled mods

[Noggog]

Right now, when given a IEnumerable<IModListingGetter<TModGetter>> modListings, it only skips mods that are missing on disk. SHould also skip mods that are disabled

This in theory will be a "big" api break.. but I think in reality it will not. Mainly because most of the usages are within synthesis which already does trimming of disabled mods