Merge link-facts.sh with extract_facts.py

[rjsmith1999]

link-facts is just a wrapper around extract facts to enable extracting facts from multiple elf files into a single aggregated facts file. We can merge this functionality into extract_facts.py and have a single tool.

[rgraves-riverside]

Initial POC has been pushed to feature/merge-linkfacts-with-extractfacts. Feature requires refactoring