[prometheus-to-sd] deprecate (#23707)

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

stable/prometheus-to-sd/Chart.yaml

@@ -1,12 +1,12 @@
 apiVersion: v1
 appVersion: 0.5.2
-description: Scrape metrics stored in prometheus format and push them to the Stackdriver
+# The prometheus-to-sd chart is deprecated and no longer maintained.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: DEPRECATED Scrape metrics stored in prometheus format and push them to the Stackdriver
 home: https://github.com/GoogleCloudPlatform/k8s-stackdriver/tree/master/prometheus-to-sd
 keywords:
 - prometheus
 - stackdriver
-maintainers:
-- name: acondrat
-  email: arcadie.condrat@gmail.com
 name: prometheus-to-sd
-version: 0.3.0
+version: 0.3.1

stable/prometheus-to-sd/README.md

@@ -1,5 +1,7 @@
 # prometheus-to-sd
 
+DEPRECATED and moved to <https://github.com/prometheus-community/helm-charts>
+
 [prometheus-to-sd](https://github.com/GoogleCloudPlatform/k8s-stackdriver/tree/master/prometheus-to-sd) is a simple component that can scrape metrics stored in prometheus text format from one or multiple components and push them to the Stackdriver
 
 ## TL;DR;

stable/prometheus-to-sd/templates/NOTES.txt

@@ -1,2 +1,4 @@
+DEPRECATED and moved to <https://github.com/prometheus-community/helm-charts>
+
 Check prometheus-to-sd pod
   $ kubectl get pods --namespace={{ .Release.Namespace }}