[prometheus-pushgateway] deprecate (#23704)

Signed-off-by: Naseem <naseem@transit.app>

stable/prometheus-pushgateway/Chart.yaml

@@ -1,16 +1,14 @@
 apiVersion: v1
 appVersion: "1.2.0"
-description: A Helm chart for prometheus pushgateway
+# The prometheus-pushgateway chart is deprecated and no longer maintained. For details deprecation,
+# including how to un-deprecate a chart see the PROCESSES.md file.
+deprecated: true
+description: DEPRECATE A Helm chart for prometheus pushgateway
 name: prometheus-pushgateway
-version: 1.4.1
+version: 1.4.2
 home: https://github.com/prometheus/pushgateway
 sources:
 - https://github.com/prometheus/pushgateway
 keywords:
 - pushgateway
 - prometheus
-maintainers:
-- email: gianrubio@gmail.com
-  name: gianrubio
-- email: christian.staude@staffbase.com
-  name: cstaud

stable/prometheus-pushgateway/README.md

@@ -1,5 +1,7 @@
 # Prometheus Pushgateway
 
+DEPRECATED and moved to <https://github.com/prometheus-community/helm-charts>
+
 * Installs prometheus [pushgateway](https://github.com/prometheus/pushgateway)
 
 ## TL;DR;

stable/prometheus-pushgateway/templates/NOTES.txt

@@ -1,3 +1,5 @@
+DEPRECATED and moved to <https://github.com/prometheus-community/helm-charts>
+
 1. Get the application URL by running these commands:
 {{- if .Values.ingress.enabled }}
 {{- range .Values.ingress.hosts }}
@@ -16,4 +18,4 @@
   export POD_NAME=$(kubectl get pods --namespace {{ .Release.Namespace }} -l "app={{ template "prometheus-pushgateway.name" . }},release={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
   echo "Visit http://127.0.0.1:8080 to use your application"
   kubectl port-forward $POD_NAME 8080:80
-{{- end }}
+{{- end }}