Fix CI

[ollien]

CI has been broken on this repo. There's a few things at play here

• There's a test that depends on ANSI coloring, but that doesn't get emitted without a TTY attached. Removed that part of the assertion.
• The jobs were never scheduled since they were looking for 20.04 instances
• These were using very old elixir/OTP versions
• The linting rule depends on an old version of node, but we don't use that linting so it's not really needed.

[sanchda]

👍