[buddy] 🐛 issue #30400 fixing missing billing_mode param in teleport-cluster helm chart fo dynamodb autoscaling (#30764)

* 🐛 issue #30400, dynamodb autoscaling mode requires `billing_mode: provisioned`

* Add tests

---------

Co-authored-by: Anathan (Ana) Ye <[email protected]>

examples/chart/teleport-cluster/templates/auth/_config.aws.tpl

@@ -13,6 +13,7 @@
     continuous_backups: {{ required "aws.backups is required in chart values" .Values.aws.backups }}
     {{- if .Values.aws.dynamoAutoScaling }}
     auto_scaling: true
+    billing_mode: provisioned
     read_min_capacity: {{ required "aws.readMinCapacity is required when aws.dynamoAutoScaling is true" .Values.aws.readMinCapacity }}
     read_max_capacity: {{ required "aws.readMaxCapacity is required when aws.dynamoAutoScaling is true" .Values.aws.readMaxCapacity }}
     read_target_value: {{ required "aws.readTargetValue is required when aws.dynamoAutoScaling is true" .Values.aws.readTargetValue }}

examples/chart/teleport-cluster/tests/__snapshot__/auth_config_test.yaml.snap

@@ -445,6 +445,7 @@ matches snapshot for aws-dynamodb-autoscaling.yaml:
           - dynamodb://test-dynamodb-auditlog-table
           audit_sessions_uri: s3://test-s3-session-storage-bucket
           auto_scaling: true
+          billing_mode: provisioned
           continuous_backups: false
           read_max_capacity: 100
           read_min_capacity: 5

examples/chart/teleport-cluster/tests/auth_config_test.yaml

@@ -502,3 +502,11 @@ tests:
           of: ConfigMap
       - matchSnapshot:
           path: data.teleport\.yaml
+
+  - it: sets "provisioned" billing mode when autoscaling is enabled
+    values:
+      - ../.lint/aws-dynamodb-autoscaling.yaml
+    asserts:
+      - matchRegex:
+          path: data.teleport\.yaml
+          pattern: 'billing_mode: provisioned'