Improve logging and debuggability of our tests

While digging into #921 (closed) I have run into issues with how we log data, namelly:

• tests that succeed log all the information obscuring logs from failed tests, making them difficult to find
• we do not log everything, basically only access-log
• we leak goroutines which makes logs panic once enabled.

The goal is to have logs like this:

This requires:

• proper propagation of the context to the App from NewTestEnv helper
• enabling logging for unittests
• changing test formart output for gotestsum to testname
• implement proper shutdown for for Notifications-related goroutines