Cosmetic: Cluster XXX does not exist, and new namespace creation is disabled

Created by: garloff

This message appears twice from mng_cluster_ns.inc when called from create_cluster.sh and create_appcred.sh (and later also delete_cluster.sh with CREATE_NEW_NAMESPACE=false. This is misleading and overly careful people could suspect that somethign has gone wrong.

> Cluster testcl1 does not exist. Creating a new cluster namespace...
namespace/testcl1 created
Context "kind-kind" modified.
> Namespace changed to testcl1
docker.io/hosts.toml is already defined in KubeadmControlPlane files
docker.io/hosts.toml is already defined in KubeadmConfigTemplate files
Switched to context "kind-kind".
> Cluster testcl1 does not exist, and new namespace creation is disabled.
#Created AppCred 14d3f44acfc147e3aeb5849a9cc0b53a
#Info: Changing OPENSTACK_CLOUD from gxscs-capi to capi4-testcl1
Waiting for image ubuntu-capi-image-v1.25.11 to become active: 3331426c-0776-4a59-8a71-d1129e8c839d active
Switched to context "kind-kind".
> Cluster testcl1 does not exist, and new namespace creation is disabled.