Consider add tests for stress testing Kata

[egernst]

containerd has a couple of tools for stress testing container lifecycle management. In particular, I'd be interesting in seeing us add tests that utilize containerd-stress. See https://github.com/containerd/containerd/blob/37f2c7ca8d681ba3d5e9e0b6a26ef0be0a382362/BUILDING.md#containerd-stress