python: install without distutils
Instead of using distutils/setuptools for installing the Python code,
just install it into our own Python directory.
Distutils is being removed from Python, and setuptools doesn't work well
when trying to install into your own location. For our usage its just
simpler to install with make.
In addition to removing the configure check for distutils, also remove
the check for pyyaml. This lets the user install pyyaml after Suricata
is installed, and Suricata-Update does handle this case gracefully.
Issue: #5313
(cherry picked from commit
9a1d6af8582be4b817e9f0ffb9d5f591dfc31fb9)