kube-prometheus: Fix config reloader RBAC

...t/prometheus/prometheus-k8s-role-binding-config.libsonnet

.../prometheus/prometheus-k8s-role-binding-default.libsonnet

...metheus/prometheus-k8s-role-binding-kube-system.libsonnet

...rometheus/prometheus-k8s-role-binding-namespace.libsonnet

...et/prometheus/prometheus-namespace-role-binding.libsonnet