Replace dependency on ovirt-guest-agent with qemu-guest-agent.
oVirt Guest Agent has been deprecated in 4.3.0 and is being removed in 4.3.1 being its more important functionalities now included in QEMU Guest Agent.
Putting this on hold for now.
After all, ovirt-guest-agent is not going to be removed but kept for SSO function which is not needed in engine appliance.
We can still save some space by dropping the ovirt-guest-agent in favor of the qemu-guest-agent
This info needs additional exposure. It took me about half an hour to find this to explain why ovirt-guest-agent-common can no longer be installed on Fedora 31. Seems like this might also have warranted an "Obsoletes: ovirt-guest-agent-common" in qemu-agent or something like that to make the transition automatic, ideally with the news. I did self-discover the qemu-agent package on F31 and wondered if this might be a replacement but it was only my thinking that perhaps there was a packaging bug in F31 that led to its omission that was or needed to be reported which got me here to an actual understanding.