fix: typing module enums references

Enum names exist only during type checking.
During runtime they should be denoted as named integral types

modules/python/src2/typing_stubs_generation/nodes/__init__.py

@@ -1,4 +1,4 @@
-from .node import ASTNode
+from .node import ASTNode, ASTNodeType
 from .namespace_node import NamespaceNode
 from .class_node import ClassNode, ClassProperty
 from .function_node import FunctionNode

modules/python/src2/typing_stubs_generation/nodes/node.py

@@ -1,7 +1,7 @@
 import abc
 import enum
 import itertools
-from typing import (Iterator, Type, TypeVar, Iterable, Dict,
+from typing import (Iterator, Type, TypeVar, Dict,
                     Optional, Tuple, DefaultDict)
 from collections import defaultdict
 

modules/python/src2/typing_stubs_generation/nodes/type_node.py

@@ -417,6 +417,10 @@ class ASTNodeTypeNode(TypeNode):
         self._module_name = module_name
         self._ast_node: Optional[weakref.ProxyType[ASTNode]] = None
 
+    @property
+    def ast_node(self):
+        return self._ast_node
+
     @property
     def typename(self) -> str:
         if self._ast_node is None: