helm: allow to configure statement policy effect (#17700)

Signed-off-by: Mathieu Parent <mathieu.parent@insee.fr>

helm/minio/templates/_helper_policy.tpl

@@ -5,7 +5,7 @@
   "Statement": [
 {{- range $i, $statement := .statements }}
     {
-      "Effect": "Allow",
+      "Effect": "{{ $statement.effect | default "Allow" }}",
       "Action": [
 "{{ $statement.actions | join "\",\n\"" }}"
       ]{{ if $statement.resources }},

helm/minio/values.yaml

@@ -273,7 +273,8 @@ policies: []
 ## example.
 # - name: writeexamplepolicy
 #   statements:
-#     - resources:
+#     - effect: Allow  # this is the default
+#       resources:
 #         - 'arn:aws:s3:::example*/*'
 #       actions:
 #         - "s3:AbortMultipartUpload"