gh-94309: Add typing.Hashable and typing.Sized for "What's New for Python 3.12" (GH-94729)

Co-authored-by: Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com>

Author: MonadChains

Doc/whatsnew/3.12.rst

@@ -132,6 +132,9 @@ CPython bytecode changes
 Deprecated
 ==========
 
+* :class:`typing.Hashable` and :class:`typing.Sized` aliases for :class:`collections.abc.Hashable`
+  and :class:`collections.abc.Sized`. (:gh:`94309`)
+
 
 Pending Removal in Python 3.13
 ------------------------------