The script for installing CI builds of the operator is currently tied to OpenShift: https://github.com/redhat-developer/rhdh-operator/blob/main/.rhdh/scripts/install-rhdh-catalog-source.sh 

We want to make it work on non-OCP clusters, so that CI tests can be run on other clusters like GKE, AKS, EKS, ...

Acceptance Criteria

• Detect if the cluster is OCP or not, and adapt the behavior accordingly
  • Some OCP-specific stuff may not work on non-OCP, e.g.:
    • picking the IIB image tag depends on the OCP version
    • creating an ICSP/IDMS
    • pushing images to the internal cluster registry
• Make sure OLM is installed as a prerequisite, as this is the supported installation method
• In the end, create a CatalogSource and a Subscription