[kube-prometheus-stack] Add support for templating in AM relabel configs and secrets

There is a need to dynamically templating relabel config and mounting
secrets like the `.Release.Name`.

Signed-off-by: Richard Tief <richard.tief@sap.com>

Author: richardtief

charts/kube-prometheus-stack/Chart.yaml

@@ -31,7 +31,7 @@ name: kube-prometheus-stack
 sources:
   - https://github.com/prometheus-community/helm-charts
   - https://github.com/prometheus-operator/kube-prometheus
-version: 68.4.5
+version: 68.4.6
 appVersion: v0.79.2
 kubeVersion: ">=1.19.0-0"
 home: https://github.com/prometheus-operator/kube-prometheus

charts/kube-prometheus-stack/templates/prometheus/additionalAlertRelabelConfigs.yaml

@@ -12,5 +12,5 @@ metadata:
     app: {{ template "kube-prometheus-stack.name" . }}-prometheus-am-relabel-confg
 {{ include "kube-prometheus-stack.labels" . | indent 4 }}
 data:
-  additional-alert-relabel-configs.yaml: {{ toYaml .Values.prometheus.prometheusSpec.additionalAlertRelabelConfigs | b64enc | quote }}
+  additional-alert-relabel-configs.yaml: {{ tpl (toYaml .Values.prometheus.prometheusSpec.additionalAlertRelabelConfigs) . | b64enc | quote }}
 {{- end }}

charts/kube-prometheus-stack/templates/prometheus/prometheus.yaml

@@ -153,7 +153,7 @@ spec:
 {{- end }}
 {{- if .Values.prometheus.prometheusSpec.secrets }}
   secrets:
-{{ toYaml .Values.prometheus.prometheusSpec.secrets | indent 4 }}
+{{ tpl (toYaml .Values.prometheus.prometheusSpec.secrets) . | indent 4 }}
 {{- end }}
 {{- if .Values.prometheus.prometheusSpec.configMaps }}
   configMaps: