Use guest kernel 6.1 as default for tests where only a single kernel is tested#5732

Manciukic wants to merge 3 commits intofirecracker-microvm:mainfirecracker-microvm/firecracker:mainfrom

Manciukic:default-guest-kernel-6.1Manciukic/firecracker:default-guest-kernel-6.1Copy head branch name to clipboard