deprecate prometheus (#23692)

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

stable/prometheus/Chart.yaml

@@ -1,8 +1,11 @@
 apiVersion: v1
 name: prometheus
-version: 11.12.0
+version: 11.12.1
 appVersion: 2.20.1
-description: Prometheus is a monitoring system and time series database.
+# The prometheus chart is deprecated and no longer maintained.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 Prometheus is a monitoring system and time series database.
 home: https://prometheus.io/
 icon: https://raw.githubusercontent.com/prometheus/prometheus.github.io/master/assets/prometheus_logo-cb55bb5c346.png
 sources:
@@ -11,12 +14,5 @@ sources:
   - https://github.com/prometheus/pushgateway
   - https://github.com/prometheus/node_exporter
   - https://github.com/kubernetes/kube-state-metrics
-maintainers:
-  - name: gianrubio
-    email: gianrubio@gmail.com
-  - name: zanhsieh
-    email: zanhsieh@gmail.com
-  - name: Xtigyro
-    email: miroslav.hadzhiev@gmail.com
 engine: gotpl
 tillerVersion: ">=2.8.0"

stable/prometheus/README.md

@@ -1,5 +1,7 @@
 # Prometheus
 
+DEPRECATED and moved to <https://github.com/prometheus-community/helm-charts>
+
 [Prometheus](https://prometheus.io/), a [Cloud Native Computing Foundation](https://cncf.io/) project, is a systems and service monitoring system. It collects metrics from configured targets at given intervals, evaluates rule expressions, displays the results, and can trigger alerts if some condition is observed to be true.
 
 ## TL;DR;

stable/prometheus/templates/NOTES.txt

@@ -1,3 +1,5 @@
+DEPRECATED and moved to <https://github.com/prometheus-community/helm-charts>
+
 {{- if .Values.server.enabled -}}
 The Prometheus server can be accessed via port {{ .Values.server.service.servicePort }} on the following DNS name from within your cluster:
 {{ template "prometheus.server.fullname" . }}.{{ .Release.Namespace }}.svc.cluster.local