Remove "attributeRestrictions" from operator-role.yaml

[jsnouffer]

The field "attributeRestrictions" is no longer a valid field for Role and should be removed from camel-k/helm/camel-k/templates/operator-role.yaml.

Upon deployment, this field is dropped from the live spec. For those using ArgoCD to deploy this chart and utilize auto-syncing, ArgoCD will constantly try to re-sync this object, to re-add the missing field to the live spec.