fix: remove reflection for gson deserilization in GsonTypeHandlerAdapter

[pollend]

these interfaces don't use serializationContext so I just dropped them from deserilization and serilization and use the methods directly.

 this.serializer = (src, typeOfSrc, context) ->
                ((GsonPersistedData) typeHandler.serialize(src, new GsonPersistedDataSerializer()))
                .getElement();

        this.deserializer = (json, typeOfT, context) ->
                typeHandler.deserializeOrNull(new GsonPersistedData(json));

[eviltak]

The change seems very reasonable to me, and is what should have been done in the first place. As long as functionality isn't broken (I imagine the only place this is likely to be used is the UI file loader), we can go ahead and merge.

[jdrueckert]

I tested it in omega and I didn't see any obvious issues. On the contrary, it fixed the

19:06:23.792 [main] ERROR o.t.rendering.nui.asset.UIFormat - Failed to deserialize field skin of notificationOverlay
java.lang.IllegalArgumentException: Cannot find field com.google.gson.Gson.deserializationContext

issue and others of this sort in my "old" omega. In a completely fresh omega workspace I didn't run into those anyway anymore, but there too I don't see any obvious issues.

Not entirely sure, though, how to thoroughly check that the functionality is not broken @eviltak