ClamAV in Containers

[stevenjcumming]

Summary

This is an early step to replace review instances with preview environments. This is also an early step in merging k8s into master.

• replace clam_scan with clamav-client
• remove clamav binaries & packages
• allow developers to mock clamav via settings.local.yml
• most files are 1:1 copies of k8s branch
• review instances should use clamav container
• updated Dockerfile & the docker-compose files to match k8s
• updated Makefile to work with new docker-compose files

Related issue(s)

Testing done

• Manual local testing for mocking ClamAV
• Manual local testing for not-mocking ClamAV
• Manual testing for ClamAV on Review Instances

Acceptance criteria

• [ ] Developers can use ClamAV with native, docker, & hybrid setup
• [ ] Developers can mock ClamAV
• [ ] ClamAV works in Review Instances