Ensure Docker client is in experimental mode
What does this MR do?
It fixes an error in make helper-dockerarchive-host that happens when the Docker client is not configured in experimental mode.
Why was this MR needed?
To avoid surprises to developers, since this is something that can be easily set on-demand for a single operation.
What's the best way to test this MR?
Run make helper-dockerarchive-host when the Docker CLI is not in experimental mode.