[3.12] gh-97959: Fix rendering of routines in pydoc (GH-113941) (GH-115296)

* Class methods no longer have "method of builtins.type instance" note.
* Corresponding notes are now added for class and unbound methods.
* Method and function aliases now have references to the module or the
  class where the origin was defined if it differs from the current.
* Bound methods are now listed in the static methods section.
* Methods of builtin classes are now supported as well as methods of
  Python classes.
(cherry picked from commit 2939ad02be62110ffa2ac6c4d9211c85e1d1720f)