[3.10] gh-93738: Documentation C syntax (:c:type:`TYPE` -> :c:expr:`TYPE`) (GH-97770) (#97870)

:c:type:`TYPE` -> :c:expr:`TYPE`
(cherry picked from commit 8b211b4cdbcddecfcc4d1682864795b5f1438c59)

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