Allow for custom labels on ingress

https://github.com/DefGuard/deployment/blob/main/charts/defguard/templates/ingress-web.yaml#L18

```
  labels:
    {{- include "defguard.labels" . | nindent 4 }}
```

Would expect a `.Values.ingress.web.labels` and `.Values.ingress.grpc.labels` so we can properly configure the labels on these ingress's.  Our use case is DNS records are created/removed based on the labels.

 