KubeRay creates Routes for RayCluster resources that have the EnableIngress field set to true.

We should disable the ability for clients / users to create such Routes that may by-pass the secure Routes created by the DW RayCluster controller.

This can be done by rejecting the creation of RayCluster resources in the RayCluster webhook, if they have the EnableIngress field set to true.

Acceptance criteria:

• As a data scientist, I cannot create a RayCluster resource with EnableIngress set to true
• As a data scientist, I can create a Ray cluster via the CodeFlare SDK