Update manifest to support generic route

[vaibhavjainwiz]

Description

With opendatahub-io/odh-model-controller#59 we had implemented a hot fix by exposing predictor URL directly to user but to provide proper fix we need to implement a generic openshift route for kserve inference service.

Now with opendatahub-io/odh-model-controller#84 we had implemented the generic route functionality so I am resetting the disableIstioVirtualHost: false

How Has This Been Tested?

Merge criteria:

• The commits are squashed in a cohesive manner and have meaningful messages.
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has manually tested the changes and verified that the changes work

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[Jooho]

looks role.yaml format has changed. is it reformatted by make run fmt by modelmesh-serving ?

[vaibhavjainwiz]

looks role.yaml format has changed. is it reformatted by make run fmt by modelmesh-serving ?

I fixed the formatting

[vaibhavjainwiz]

closing it because manifest are now moved inside individual repos.