Document the following items:

• List the supported multiple backends (with or without helm), if Helm is enabled for Multicluster Console (Technology Preview).
• A note on the helm section about multi-cluster support and link it to the Dev Console multi-cluster docs.

If disabled, then add updates for 4.12 with this statement in the Key features section: "In OpenShift Container Platform 4.10 and later, Helm is disabled for the Multicluster Console (Technology Preview)."

The "Multicluster Console" in this sentence will have a link to the Dev Console multi-cluster docs section.