Add __hash__ for a bunch of types that set it to None (#13286)

stdlib/parser.pyi

@@ -1,7 +1,7 @@
 from _typeshed import StrOrBytesPath
 from collections.abc import Sequence
 from types import CodeType
-from typing import Any, final
+from typing import Any, ClassVar, final
 
 def expr(source: str) -> STType: ...
 def suite(source: str) -> STType: ...
@@ -17,6 +17,7 @@ class ParserError(Exception): ...
 
 @final
 class STType:
+    __hash__: ClassVar[None]  # type: ignore[assignment]
     def compile(self, filename: StrOrBytesPath = ...) -> CodeType: ...
     def isexpr(self) -> bool: ...
     def issuite(self) -> bool: ...