[3.13] Postpone <stdbool.h> inclusion after Python.h (#130641) (#130675)

Postpone <stdbool.h> inclusion after Python.h (#130641)

Remove inclusions prior to Python.h.

<stdbool.h> will cause <features.h> to be included before Python.h can
define some macros to enable some additional features, causing multiple
types not to be defined down the line.

(cherry picked from commit 830f04b5056db92ba96387db0a778dcd19a39522)

Co-authored-by: Hugo Beauzée-Luyssen <hugo@beauzee.fr>