chore(devimint): print out stderr of commands we're running

[dpc]

I find logs of commands used by devimint as useful (if not more) than the logs of devimint itself.

[bradleystachurski]

@dpc I think this is useful and we shouldn't revert, but I'm having trouble finding a way to programmatically parse the output of stderr in devimint tests. Did you happen to see a way we could both log stderr and still capture in output?

[dpc]

@bradleystachurski We should not need to parse stderr of commands, at least commonly. If you really do need it, you could just not use the macro and the method under the hood, and configure tokio::process::Command ad-hoc. Or possibly we could have another macro and/or function for it.

[bradleystachurski]

@dpc Sounds good, I should have a PR up soon with an approach that lets us eat our stderr and have it too.