Add ability to set labels on Deployment

[DanTulovsky]

Describe the solution you'd like

Much like we can set labels on pods with podLabels it would be useful to have the ability to set labels on the Deployment objects as well. For example, we would like to set a app.kubernetes.io/name label on the Deployment and there is no way to do this with the existing chart.

Anything else you would like to add:
[Miscellaneous information that will assist in solving the issue.]

Environment:

• Gatekeeper version: All
• Kubernetes version: (use kubectl version): All

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 14 days if no further activity occurs. Thank you for your contributions.

[DanTulovsky]

This doesn't look like it's completed...

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: '{{ template "gatekeeper.name" . }}'
    chart: '{{ template "gatekeeper.name" . }}'
    control-plane: controller-manager
    gatekeeper.sh/operation: webhook
    gatekeeper.sh/system: "yes"
    heritage: '{{ .Release.Service }}'
    release: '{{ .Release.Name }}'
  name: gatekeeper-controller-manager
  namespace: '{{ .Release.Namespace }}'

[ritazh]

It got closed due to staleness.

For anyone who is interested in adding this, PTAL how pod labels were add for inspiration: https://github.com/open-policy-agent/gatekeeper/pull/3378/files

[prakrit55]

@ritazh, I am interested to contribute, could you assign it to me