Enforce python requests using the system cert store

.gitlab-ci.yml

@@ -835,6 +835,9 @@ kube-prometheus-stack-alerts:
   variables:
     # RESOURCE var is used in job specific rules (i.e. .kube_prometheus_stack_rules)
     RESOURCE: "kube-prometheus-stack"
+    # Enforce python requests using the system cert store, where LE staging
+    # cacert is added
+    REQUESTS_CA_BUNDLE: "/etc/ssl/certs/ca-certificates.crt"
   allow_failure: true
   script:
     - *debug_information