Fix initializing of the datetime module native extension

GraalPyPrivate_InitNativeDateTime calls GraalPyPrivate_Set_Native_Slots that didn't expect a built in class like datetime or date

Author: andrykonchin

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/cext/PythonCextBuiltins.java

@@ -160,7 +160,6 @@
 import com.oracle.graal.python.builtins.objects.tuple.PTuple;
 import com.oracle.graal.python.builtins.objects.type.PythonAbstractClass;
 import com.oracle.graal.python.builtins.objects.type.PythonBuiltinClass;
-import com.oracle.graal.python.builtins.objects.type.PythonClass;
 import com.oracle.graal.python.builtins.objects.type.PythonManagedClass;
 import com.oracle.graal.python.builtins.objects.type.TpSlots;
 import com.oracle.graal.python.builtins.objects.type.TypeNodes;
@@ -1035,7 +1034,7 @@ static void doObject(PythonObject object, TruffleString key, Object value,
     abstract static class GraalPyPrivate_Set_Native_Slots extends CApiTernaryBuiltinNode {
 
         @Specialization
-        static int doPythonClass(PythonClass pythonClass, Object nativeGetSets, Object nativeMembers,
+        static int doPythonClass(PythonManagedClass pythonClass, Object nativeGetSets, Object nativeMembers,
                         @Bind Node inliningTarget,
                         @Cached HiddenAttr.WriteNode writeAttrNode) {
             writeAttrNode.execute(inliningTarget, pythonClass, NATIVE_SLOTS, new Object[]{nativeGetSets, nativeMembers});