refactor: use variants in zone instead of only game

test/ObjLoadingTests/Game/T4/Menu/LoaderMenuListT4Test.cpp

@@ -20,7 +20,7 @@ namespace
     {
     public:
         MenuLoadingTestHelper()
-            : m_zone("MockZone", 0, GameId::T4, GamePlatform::PC),
+            : m_zone("MockZone", 0, GameVariantId::T4_PC),
               m_creator_collection(m_zone),
               m_context(m_zone, &m_creator_collection, &m_ignored_asset_lookup)
         {

test/ObjLoadingTests/Game/T4/PhysPreset/RawLoaderPhysPresetT4Test.cpp

@@ -22,7 +22,7 @@ namespace
         MockSearchPath loadingSearchPath;
         loadingSearchPath.AddFileData("physic/test_phys_preset", RAW_PHYS_PRESET);
 
-        Zone loadingZone("LoadingZone", 0, GameId::T4, GamePlatform::PC);
+        Zone loadingZone("LoadingZone", 0, GameVariantId::T4_PC);
         AssetCreatorCollection creatorCollection(loadingZone);
         IgnoredAssetLookup ignoredAssetLookup;
         AssetCreationContext loadingContext(loadingZone, &creatorCollection, &ignoredAssetLookup);

test/ObjLoadingTests/Game/T4/StringTable/LoaderStringTableT4Test.cpp

@@ -19,7 +19,7 @@ namespace
                                "test,data,lol\n"
                                "lorem,ipsum");
 
-        Zone zone("MockZone", 0, GameId::T4, GamePlatform::PC);
+        Zone zone("MockZone", 0, GameVariantId::T4_PC);
 
         MemoryManager memory;
         AssetCreatorCollection creatorCollection(zone);