Fix: Fix CRDs not rendering due to no default values (#5319)

* Creates new default values file to ensure upgrade job
  does not break chart rendering
* Adds unit test to ensure no regressions
* Bumps kube-prometheus-stack patch

Signed-off-by: jcrsilva <jcrsilva@users.noreply.github.com>
Signed-off-by: Jan-Otto Kröpke <github@jkroepke.de>
Co-authored-by: Jan-Otto Kröpke <github@jkroepke.de>

Author: jcrsilva

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: 69.3.0
+version: 69.3.1
 appVersion: v0.80.0
 kubeVersion: ">=1.19.0-0"
 home: https://github.com/prometheus-operator/kube-prometheus

charts/kube-prometheus-stack/charts/crds/unittests/rendering_test.yaml

@@ -0,0 +1,6 @@
+suite: test rendering
+tests:
+  # 5307
+  - it: should render when no values are set
+    asserts:
+      - notFailedTemplate: {}

charts/kube-prometheus-stack/charts/crds/values.yaml

@@ -0,0 +1,4 @@
+## Check out kube-prometheus-stack/values.yaml for more information
+## on this parameter
+upgradeJob:
+  enabled: false