[kata-dev] Qemu 4

Folks, Qemu 4 was released this week, is there a plan to start using this new version in kata containers? In the meantime, I have created a new branch in kata-container/qemu [1] to test this new version + kata patches. Only two patches were applied: 1. 9p optimizations. 2. vm-templating patch. Thanks - Julio Notes: * Memory footprint looks better [1] - https://github.com/kata-containers/qemu/tree/kata-qemu-4.0.0