[$] Faster kernel testing with virtme-ng

Building new kernels and booting into them is an unavoidable-andtime-consuming-part of kernel development. Andrea Righi works forCanonical on the Ubuntu kernel team, so he does a lot of that and wanted tofind a way to speed up the task. To that end, he has been workingon virtme-ng, which is away to boot a new kernel in a virtual machine, and it doesso quickly. He came to the 2023Linux Plumbers Conference (LPC) in Richmond, Virginia to introduce theproject to a wider audience.