POC Postgres cache database design

[filipmacek]

Pull Request

• renamed the feature sql to postgres in the infrastructure crate to closely follow the technology feature naming (like we have redis there)
• moved get_schema_dir , init_postgres and drop_postgres from cli crate to infrastructure crate
• removed manual redis install in github actions workflow and added redis and postgres container service there
• deleted old SqlCacheDatabase that used sqlx Any db driver
• Implemented a new PostgresCacheDatabase that spawns a new tokio thread and listens for INSERT queries and saved them to database