[CI] Introduce interface for additional lint tasks

Signed-off-by: Jan-Otto Kröpke <[email protected]>

.github/linters/ct.yaml

@@ -12,4 +12,5 @@ excluded-charts:
   # If not running on GCE, will error: "Failed to get GCE config"
   - prometheus-to-sd
 additional-commands:
+  - sh -c "if [ -f '{{ .Path }}/ci/lint.sh' ]; then exec bash '{{ .Path }}/ci/lint.sh'; fi"
   # - helm unittest --helm3 --strict --file unittests/*.yaml --file 'unittests/**/*.yaml' {{ .Path }}

charts/kube-prometheus-stack/Chart.yaml

@@ -21,7 +21,7 @@ name: kube-prometheus-stack
 sources:
   - https://github.com/prometheus-community/helm-charts
   - https://github.com/prometheus-operator/kube-prometheus
-version: 52.1.0
+version: 52.1.1
 appVersion: v0.68.0
 kubeVersion: ">=1.19.0-0"
 home: https://github.com/prometheus-operator/kube-prometheus

charts/kube-prometheus-stack/ci/lint.sh

@@ -0,0 +1,4 @@
+#!/usr/bin/env sh
+
+echo "lint test"
+exit 2