Implement event creation after terminating a pod

[djboris9]

Currently chaoskube logs the termination of pods only to stdout. This patch implements the creation of a Kubernetes Event in victims namespace so users which cannot access chaoskubes logs can see who terminated their pod. There is a new flag to disable this feature.

Event looks like:

$ kubectl get events
LAST SEEN   FIRST SEEN   COUNT     NAME                                       KIND        SUBOBJECT                      TYPE      REASON         SOURCE                            MESSAGE
56s         56s          1         calico-node-tj5pq.chaos.15543f44b237b716   Pod                                        Normal    Chaos                                            Deleted pod calico-node-tj5pq

RBAC rules were extended to allow this function.

[linki]

Thanks @djboris9 🎉

[linki]

For anyone who cares: the third part of the event name is the timestamp of ThankGodItsFriday{}.Now() (Fri, 24 Sep 1869 15:04:05 UTC, roughly a hundred years before timestamp 0) in nanoseconds and encoded in base64... 🤷‍♂️