Allow some extra labels for controller Deployment installed by the Helm chart

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

The chart doesn't allow setting extra labels on the controller Deployment or more generally doesn't allow to add some common labels to all ressources. I need it to monitor the application and set some metadata for better management of monitoring alerts.

**Describe the solution you'd like**

Either fix the chart to also apply "controller.extraLabels" value to the Deployment or add a new "controller.extraDeploymentLabels" value.

Same thing should be done for annotations.

**Describe alternatives you've considered**

Doing a "kubectl label" after applying the chart

Start with the Helm chart's values and controller Deployment template, focusing on controller.extraLabels and the requested annotation settings. Done means the chart can configure extra labels and annotations on the controller Deployment and the rendered Helm output reflects them.

Written by the indexing model from the issue text.