Runs indefinitely when used as an `onCreateCommand` in GH Codespaces

[agilgur5]

Follow-up to https://github.com/argoproj/argo-workflows/pull/11928#issuecomment-1754165093 and https://github.com/argoproj/argo-workflows/issues/11423.

[...] Codespaces running indefinitely on kit pre-up: https://github.com/argoproj/argo-workflows/issues/11423. I even got a notification from GH that it used up 24 hours of compute before I even had access to a terminal (it apparently ran all night even after I closed the tab and turned off my computer). I just looked into that yesterday and think it can be solved by switching the devcontainer's onCreateCommand to a postCreateCommand, but something weird is going on with how Codespaces is interacting with kit specifically at build-time. I saw it restart a few processes repeatedly too, not sure why.

Possibly related to #42 given the restarts I saw, but not sure

[agilgur5]

Can confirm that moving to a postCreateCommand fixed it (see https://github.com/argoproj/argo-workflows/pull/11981), though I'm not sure why kit runs indefinitely when used as an onCreateCommand