Remove the redis-tls, wfe-tls, and mail-test-srv keys which were generated by minica and then checked in to the repo. All three are replaced by the dynamically-generated ipki directory. Part of https://github.com/letsencrypt/boulder/issues/7476
Part of #5545
Fixes #6517
Switch from standalone docker-compose binary to the "docker compose" subcommand everywhere.
Aaron Gable
Samantha
Phil Porada
Jacob Hoffman-Andrews