* Create `utils/pod` package: pod kind detection functions.
* Update DaemonSet Pod detection logic: introduce the annotation
`cluster-autoscaler.kubernetes.io/daemonset-pod` to declare a Pod as a
DaemonSet Pod.
* Update `simulator` package to use the new `utils/pod` package function.
* Cleanup `getRequiredPodsForNode()` function.
Signed-off-by: cedric lamoriniere <cedric.lamoriniere@datadoghq.com>