[3.11] gh-93738: Documentation C syntax (:c:type:`PyTypeObject*` -> :c:expr:`PyTypeObject*`) (GH-97778) (#97892)

Co-authored-by: Ezio Melotti <ezio.melotti@gmail.com>
(cherry picked from commit c70c8b69762f720377adaf22f2e5ec6496a7be53)

Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>