Copr builders powered by bootc

As of today, all Copr builder virtual machines are now being spawned from bootc images, which is no small feat because the builder infrastructure involves multiple architectures (x86_64, aarch64, ppc64le, s390x), multiple clouds (Amazon AWS, IBM Cloud), and on-premise hypervisors. It scales up to 400 builders running simultaneously and peaking at 30k builds a day . Before bootc You can find some…