Merge closely linked charts

[blootsvoets]

Charts like radar-upload-backend, -frontend and -connector are so closely linked, they could be represented by a single chart with separate templates for each of the components. See for example https://github.com/prometheus-community/helm-charts/tree/main/charts/kube-prometheus-stack with separate template directories per component at https://github.com/prometheus-community/helm-charts/tree/main/charts/kube-prometheus-stack/templates.

The values.yaml can still be used to configure each of the services. Other examples:

• rest-sources-authorizer, -backend
• radar-upload-backend, -frontend and -connector
• app-config, -frontend

This makes reuse of values easier and concentrates configuration to where it's needed. Potential disadvantages: some logic may need to be incorporated to override e.g. image tag per subcomponent. However this is not urgent.

[keyvaann]

Can we include Radar-backend-monitor and -stream too?