Hotfix

- Added base requirements.in with pip
- Created base requirements.txt with pip pinned by hash
- Recreated requirements.txt with --allow-unsafe to get correct setuptools
- Updated feluda core dockerfile to install pip using base requirements
- Updated ci test dockerfile to install pip using base requirements
- Updated all benchmark dockerfiles to install pip using base requirements
- Updated all worker dockerfiles to install pip using base requirements
- Updated readme pip install and pip-compile commands