Race condition when version is `latest` [P9999]

Low impact as it wouldn't happen in real environments, only for `dev/dev-*`.

Conditions that have to be met:
- a new version of the stack (eg: frontend) is created after the deploy has been triggered, but before that the corresponding pre-apply/post-apply hook is called from Terragrunt.
- using `latest` (which relies on Github as the source of truth to give a real tag to `latest`, eg: `vX.Y.Z`).