delete operator deployment during upgrade

[vas777]

kubectl delete deployment.apps/scone-controller-manager

to avoid

Error: UPGRADE FAILED: failed to replace object: Deployment.apps "scone-controller-manager" is invalid: spec.selector: Invalid value: v1.LabelSelector{MatchLabels:map[string]string{"app":"scone-controller", "app.kubernetes.io/name":"scone-controller", "control-plane":"controller-manager"}, MatchExpressions:[]v1.LabelSelectorRequirement(nil)}: field is immutable
"helm upgrade --install scone-operator ./scone-operator --force --namespace $NAMESPACE --version $VERSION --set image=$PULL_IMAGE" command failed - exiting.

noticed with

rc.2. to rc.3