Removing pull secret by helm has no effect on running policy server

[kravciak]

Current Behavior

I set up default policy server with pull secret. When I remove pull secret later it has no effect on active policy server deployment.

Steps To Reproduce

Default configuration has no pull secret

~ helm get values -n kubewarden kubewarden-defaults
  USER-SUPPLIED VALUES:
  null
~ k get deploy -n kubewarden policy-server-default -o yaml | grep secret-registry

Set up pull secret and see changes as expected

~ kubectl --namespace kubewarden create secret docker-registry secret-registry-docker \
    --docker-username=testuser \
    --docker-password=testpassword \
    --docker-server=192.168.64.2.nip.io:30707
~ helm upgrade --wait --reuse-values --set policyServer.imagePullSecret=secret-registry-docker --namespace kubewarden kubewarden-defaults kubewarden/kubewarden-defaults

~ helm get values -n kubewarden kubewarden-defaults
  USER-SUPPLIED VALUES:
  policyServer:
    imagePullSecret: secret-registry-docker

~ k get deploy -n kubewarden policy-server-default -o yaml | grep secret-registry
  secretName: secret-registry-docker

Remove pull secret has not effect on running policy-server

~ helm upgrade --wait --reuse-values --set policyServer.imagePullSecret=null --namespace kubewarden kubewarden-defaults kubewarden/kubewarden-defaults

~ helm get values -n kubewarden kubewarden-defaults
  USER-SUPPLIED VALUES:
  policyServer: {}
~ k get deploy -n kubewarden policy-server-default -o yaml | grep secret-registry
  secretName: secret-registry-docker