Investigate Nextest

[abernix]

Is your feature request related to a problem? Please describe. At the moment, we're unable to get reports on our tests through CircleCI's Test Insights feature since there's no built-in way to generate JUnit tests in cargo test unless you're running with the +nightly and using the --format json output, and then still converting it further to be in JUnit-ish.

This prevents us from tracking the speed of our tests and hold ourselves accountable for improving them, or identifying flakey tests with metrics.

Describe the solution you'd like

Ideally, cargo test would just support JUnit or JSON without needing to use a nightly build. Given that it's been a long time waiting now, using another test runner might be a way to get those insights.

Maybe using Nextest could actually be a way to get this, and then we could implement the test collection configuration