Fixes for numpy 1.21.4 and python 3.10

Since py3.10 has 2 digits after the period, globbing for a single character no longer works. This is complicated by the presense of f2py3.x-dbg. Mostly address py3.10 by way of install file fixes, and handle the rest in rules dh_install override.

The distutils autopkgtest does not like the removal of /usr/include as a plausible include file location. A symptom of this problem is the following test failure: numpy.distutils.system_info.FFTWNotFoundError: FFTW (http://www.fftw.org/) libraries not found.