[prometheus-adapter] Add extra objects template (#5479)

Signed-off-by: Sebastian Gaiser <[email protected]>

Author: sebastiangaiser

Diff for: charts/prometheus-adapter/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: prometheus-adapter
-version: 4.13.0
+version: 4.14.0
 appVersion: v0.12.0
 description: A Helm chart for k8s prometheus adapter
 home: https://github.com/kubernetes-sigs/prometheus-adapter

Diff for: charts/prometheus-adapter/templates/extra-objects.yaml

@@ -0,0 +1,4 @@
+{{ range .Values.extraManifests }}
+---
+{{ tpl (toYaml .) $ }}
+{{ end }}

Diff for: charts/prometheus-adapter/values.yaml

@@ -302,3 +302,13 @@ certManager:
   # Defaults to nil.
   caCertRevisionHistoryLimit:
   certRevisionHistoryLimit:
+
+## Extra manifests to deploy as an array
+extraManifests: []
+  # - apiVersion: v1
+  #   kind: ConfigMap
+  #   metadata:
+  #   labels:
+  #     name: prometheus-extra
+  #   data:
+  #     extra-data: "value"