Let operator set CA configmap contents

Reason: argocd app outOfSync after upgrade to 4.8

this asks OKD to inject CA certificates in the configmap. But if we do this, we should have an empty data as per https://access.redhat.com/documentation/en-us/openshift_container_platform/4.2/html/networking/configuring-a-custom-pki#certificate-injection-using-operators_configuring-a-custom-pki - and we should tell ArgoCD to ignore changes to the configmap's data with a spec.ignoreDifferences in the application definition