Feature: Configure Kubernetes's graceful node shutdown feature

[ricsanfre]

Feature Request

Since Kubernetes 1.21 there is Graceful node shutdown This feature, still in beta status is documented here. and it ensures that pods follow the normal pod termination process during the node shutdown.
Since I always shutdown my cluster when I finish my testing/learning, pods not always shutdown gracefully and the cluster sometimes remain in a inconsistent status forcing me to reset the whole installation.

Implementation details

To activate this feature in K3S cluster the instruction in this k3s discussion can be followed.