With the previous approach, not all associated (mounted) CM/Secrets
changes caused the Deployment to be rolled out, but also the Deployment
could have been rolled out unnecessary during e.g. Ingress or Service
changes (which do not require Pod restarts).
Previously existing Pod removal (state: absent) was not complete as
other pods continued to exist, but also is not needed with this commit
change due to added Pods annotations.
The added Deployment Pod annotations now cause the new ReplicaSet
version to be rolled out, effectively causing replacement of the
previously existing Pods in accordance with the deployment `strategy`
(https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.25/#deploymentstrategy-v1-apps,
`RollingUpdate`) whenever there is a change in the associated CMs or
Secrets referenced in annotations. This implementation is quite standard
and widely used for Helm workflows -
https://helm.sh/docs/howto/charts_tips_and_tricks/#automatically-roll-deployments
