Use PyCapsule in CThunks instead of numpy compatibility layer

[ricardoV94]

Description

This seems to have been used around the Python2.x transition, we should probably get up with the times:

pytensor/pytensor/link/c/cutils.py

Lines 50 to 53 in e299023

	# This is not the most efficient code, but it is written this way to
	# highlight the changes needed to make 2.x code compile under python 3.
	code = code.replace("<Python.h>", '"numpy/npy_3kcompat.h"', 1)
	code = code.replace("PyCObject", "NpyCapsule")