Establish Workspace and Storage Controller pipeline variant with vCluster for runtime

[achtsnits]

follow-up investigations of #11

setup to be used on EOEPCA-Demo cluster with vCluster automatically provisioned for a team

flag on Workspace CRD should state if vCluster or namespace in host k8s cluster should be established allowing to run both side by side in EOEPCA-Demo cluster

signoff: a separate pipeline definition using vCluster to setup the runtime environment for a new team is included in https://github.com/EOEPCA/workspace/tree/main/setup