Add "labels" to Drydock deployment

Adding said label, that's already defined, to the deployment itself.
This will enable Armada to properly wait for certain percentages
of the deployment replicas to be ready prior to proceeding. Prior to
this change, there wasn't a way to select the Drydock deployment via
labels.

Change-Id: I7c5ed223d54213a1260c27485d0bfd493c09163f

charts/drydock/templates/deployment.yaml

@@ -23,6 +23,8 @@ apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: drydock-api
+  labels:
+{{ $labels | indent 4 }}
   annotations:
     {{ tuple $envAll | include "helm-toolkit.snippets.release_uuid" }}
 spec: