FilterByPodmanPrefix does two things: first it filters the keys that start with prefix "podman/" And secondly, of those keys that have the "podman/" prefix, it uses the remaining part of the key as the new key in the returning map with the same value as in the original map e.g.

HasFinalizer checks whether specific finalizer is set on a CR.

NormalizeLabel normalizes label string according to k8s format.