CPython added PyMem_RawCalloc and PyMem_Calloc in version 3.5.

The #defines of PyMem_RawMalloc, PyMem_RawRealloc, and PyMem_RawFree
are removed from Cython/Utility/ModuleSetupCode.c since the Raw versions allow
use without the GIL but the non-Raw versions do not.
Co-authored-by: William Schwartz <wkschwartz@gmail.com>

Closes https://github.com/cython/cython/pull/3050
Closes https://github.com/cython/cython/pull/3047