Avoid unpacking LuaObject Variants that come from a different LuaState

[gilzoide]

In to_lua, we should only unpack LuaObjects to the LuaState that they belong. In case of accessing them in a different LuaState, keep them wrapped in a Variant to avoid problems.

Code that needs patching:

lua-gdextension/src/utils/convert_godot_lua.cpp

Lines 153 to 156 in 3075444

	if (LuaObject *lua_obj = Object::cast_to<LuaObject>(value)) {
	sol::stack::push(lua_state, lua_obj->get_lua_object());
	break;
	}