Add config map / secret hash based auto roll to Helm Chart

[t83714]

Add config map / secret hash-based auto roll to Helm Chart

For this deployment: https://github.com/TerriaJS/TerriaMap/blob/main/deploy/helm/terria/charts/terriamap/templates/deployment.yaml

Currently, the deployment won't auto-restart on deployment when the only changes are config map or secrets.

It would be good to adopt this approach so that the existing pod will be auto restarted to load the latest config map / secrets when config map / secrets are changed.

See doc here: https://helm.sh/docs/howto/charts_tips_and_tricks/#automatically-roll-deployments