still lots todo but it's a start

I know this might be better implemented as a TPA-RFC, logically, but
i feel we already have rough consensus on this.

The last request for a VM that came in (#40070) really demonstrated to
me the reason for this deprecation: `tekesicola` is certainly a
nice-looking name, but I have no idea what it means or why it was
picked. So it would make someone unfamiliar with the history of that
machine to actually know what it's for.

11:23:56 <weasel> I think this is something aurel came up with
11:24:08 <weasel> AIUI, it adds to the qemu command line,
11:24:26 <weasel> and it's a way to get randomness to VMs
11:25:45 <weasel> https://wiki.qemu.org/Features/VirtIORNG has some info on it

This failed in the gnt-chi cluster initialization.