Add cloud hypervisor to provision.sh

Let's download it every time regardless, and have an option in the flags?

Also don't forget to have a bin check in the service file.

Start by reading provision.sh to understand how the hypervisor is downloaded and how flags are parsed, then inspect the service file for its existing binary check. Done means the hypervisor is downloaded on every run, an option controls it through the flags, and the service file checks for the binary.

Written by the indexing model from the issue text.