Operator should react to changes in secrets referenced in the datasource CR

[udaydabbeta]

Is your feature request related to a problem? Please describe.

To create a datasource via the Grafana DataSource CR, if I reference a secretRef or configMapRef to provide certificates like ca.cert or TLS credentials required for the datasource.

If the referenced secret or configMap is updated (e.g., during certificate rotation), the operator does not react to changes to a referenced SecretRef for GrafanaDatasources.

Describe the solution you'd like

When the SecretRef used in Datasource CR is changed, operator should react to the change and reconcile the Data Source.

[theSuess]

If someone wants to help out here, we do something similar for dashboards and configmaps: https://github.com/grafana/grafana-operator/blob/master/controllers/dashboard_controller.go#L577

Should be a straight forward port do to the same for data sources and secrets