Python target integration

[DavidKorczynski]

Integrate support for Python fuzzing.

Roughly, the steps:

1. Add a set of test cases such that once these are analysed properly we have basic support for python
2. Add static analysis part to cover the basic data needed by the post-processing. In this context use a (modified) version of https://github.com/vitsalis/PyCG
3. Add support for extracting the static data on a project-wide level
4. Demonstrate basic capabilities of fuzz-introspector excluding runtime coverage information
5. Add runtime coverage features, using the coverage approach from OSS-Fuzz
6. Demonstrate full end-to-end features
7. Cleanup/refactor to ensure datastructures neatly fit the existing fuzz-introspector implementation

[DavidKorczynski]

The current state is:

This is from pyyaml OSS-Fuzz project run by way of https://github.com/ossf/fuzz-introspector/blob/main/oss_fuzz_integration/run_both.sh

[DavidKorczynski]

Example using it on idna:

[DavidKorczynski]

glom:

[DavidKorczynski]

Python is now working in general. Closing this and will make more specific issues for further Python work.