Fix VivHelper/FrostHelper not being recognized properly

[strandsofivy]

There is a rare load order bug with vivhelper/frosthelper handling in crystallinehelper, namely that vitmod will sometimes treat as if both are not present even though they are. This is because Load() is called immediately after a module is loaded, despite the docs saying it gets called after all mods are loaded. Therefore since optional mods can load at any time even after a mod has been loaded and DependencyLoaded() does not account for this, its incorrect to check for the presence of optional mods during Load() time

Initialize() however is called after all mods have been loaded and the game is initializing, so DependencyLoaded() will give expected results