Track step groups more accurately

[evanphx]

This goes along with hashicorp/waypoint-plugin-sdk#31 to properly track concurrent step groups to avoid confusing UI issues.

[krantzinator]

Is this supposed to fix the problem with step groups exiting too quickly to log their final state, or be part 1 in the puzzle?
I just ran a waypoint init (installed server in nomad, waypoint-examples/nomad/nodejs) off this branch and got an unfinished state:

$ waypoint init
✓ Configuration file appears valid
✓ Connection to Waypoint server was successful
✓ Project "example-nodejs" and all apps are registered with the server.
⠹ Validating required plugins...
$

[krantzinator]

Ah maybe I should wait on this until the sdk PRs are merged in 😄

[briancain]

It looks like the sdk fixes are in and I have the same issue with waypoint int

And then the waypoint up output is completely lost 🤔

Or trying a second time:

[krantzinator]

@evanphx Should we move this to 0.5 milestone?

[hashicorp-cla]

All committers have signed the CLA.

[xiaolin-ninja]

@evanphx please magnificent sir amongst sirs, will we carry this wonderful PR to its completion at a date in the near future befitting of your sirness? <3

[evanphx]

@xiaolin-ninja A chance to debug, perchance to find this bug most foul! Forthwith, I shall turn the hourglass once again and bring the powers that be upon it!

[briancain]

Should we close this?