chore: update the generated Compose files

What does this PR do?

Compose V1 being outdated (and the docker compose command starting complaining), this updates the Docker Compose files that are generated by this tool to remove the version field (it is optional and pretty much ignored by Compose anyway).

Nothing else has been modified as our Compose files are already compliant with the current schema.

Other changes

This fixes one of the tests for a better compatibility with the semver string format.