deploy: use master branch for kAFL collection

[Wenzel]

This PR removes the pinning on stable-v0.5 branch for the kAFL Ansible collection and uses master instead.

See this ticket https://github.com/IntelLabs/kAFL/issues/184 The ccc repo's bkc role is already overriding the versions pinned by stable-v0.5 anyway.

I also rebased kafl.fuzzer's kafl_tdx branch to master, these are the changes (99 commits, 42 files changed): https://github.com/IntelLabs/kafl.fuzzer/compare/kafl_tdx...master

The main user interfaces changed are

• new kafl fuzzer command line, subcommand style: kafl_fuzz.py -> kafl fuzz, etc. see https://github.com/IntelLabs/kafl.fuzzer/pull/22
• using dynaconf to handle kafl configuration. See the kafl fuzzer documentation

The rebased branch has been pushed on my own fork under kafl_tdx_rebased to avoid breaking anything while we work on this PR.