WINTERMUTE: Add workaround flags and use a workaround flag to fix #6647

Behaviour of BaseSprite::reset() changed in WME 1.8.6.
5MA and possibly other games ship with pre-1.8.6 WME, and depend on the old behaviour.

We then set up WME-specific workaround flags and use one of them to mark a game as depending on the old behaviour.

I had a lot of guidance from @fuzzie on this - but don't blame the poor lady if it's still ugly, the ugly parts are all mine.

If you prefer a less invasive (but imho rather ugly) solution there's my branch fix_cat_hackish: 
https://github.com/tobiatesan/scummvm/compare/fix_cat_hackish

It simply if()s to look at the game name.


I kind of think we do, since the TargetExecutable enum is not supposed to be used for game-specific workarounds (aka any workaround that's different from "game X shipped with executable Y so let's ape it").
In practice, we could zap it and nobody would notice, but I guess it would have to be reinstated at some point in the future when an actual workaround is needed.

Your call.