Add prometheus discovery selector for standard k8s labels (#1877)

Co-authored-by: Pavan Gudiwada <pavangudiwada@users.noreply.github.com>

Author: pavangudiwada

src/robusta/integrations/prometheus/utils.py

@@ -137,6 +137,7 @@ def find_prometheus_url(cls) -> Optional[str]:
             selectors=[
                 "app=kube-prometheus-stack-prometheus",
                 "app=prometheus,component=server,release!=kubecost",
+                "app.kubernetes.io/name=prometheus,app.kubernetes.io/component=server",
                 "app=prometheus-server",
                 "app=prometheus-operator-prometheus",
                 "app=rancher-monitoring-prometheus",