Feat/add cspo compat.sh

[garloff]

This enables the feature flags for capi, adds the GIT_ environment for CSO/CSPO and creates an install_cspo.sh [cspo [cluster]] script that deploys the cluster classes. This follows the instructions at https://input.scs.community/_HeOTRCRSu2Uf2SfMSoOkQ?both# with minor improvements such as creating an app-cred on the fly (per cspo), detecting the external network id and allow to set the cluster namespace.