Automatically install all optional dependencies

[twizmwazin]

Currently we have all optional dependencies manually specified, we should add some sort of logic to do this programatically so that new optional dependencies don't require an update to the CI image. setuptools doesn't currently seem to have a good way to do this. We could attempt parsing the setup.py ourselves, but I think it would be preferable to add a flag to setuptools to enable this if at all possible.

[twizmwazin]

Setuptools can now read from a setup.cfg, and many angr repos have been switched to make use of it. Implementing this should be a matter of parsing the setup.cfg file and adding all optional dependencies to the install command.