Bug: Missing ClusterRole "prometheus-ns-access"

[VedantMahabaleshwarkar]

Context:

Odh-model-controller originally was developed with the modelmesh-monitoring stack in mind. This modelmesh-monitoring component is now deprecated and odh-model-controller should not depend on it.

Short term solution if needed :
Add missing rbac files from https://github.com/opendatahub-io/odh-manifests/tree/master/modelmesh-monitoring/base/prometheus/rbac to odh-model-controller manifests to get rid of the error.

Long term solution:
Remove logic from odh-model-controller that involves the modelmesh-monitoring component

[davidesalerno]

@VedantMahabaleshwarkar what do you think if for 2.5 we will leave things AS-IS and we will go for the long term solution for 2.6?
The errors that at the moment are raised from the odh-model-controller are not fatal and so they could be considered more as warnings and so "suppressed".

cc @vaibhavjainwiz @danielezonca