Report final k8s progress as 100%
Without this, the last visible line sometimes looks like
K8s deployment progress: 95% (ok: 1981; fail: 0; left: 85)
K8s deployment progress: 97% (ok: 2062; fail: 0; left: 46)
Change-Id: Ie00662831787c9c7552a90c28098004e5d71cdff
WIP-ish; I’m not sure if this way to solve it actually makes sense, but it feels like it should work. (Completely untested, of course.)