fix(tests): Helm 4 compatability

Author: adwk67

docs/modules/opensearch/examples/getting_started/opensearch-dashboards-values.yaml

@@ -21,6 +21,8 @@ config:
     opensearch_security:
       cookie:
         secure: true
+# See https://github.com/opensearch-project/helm-charts/blob/main/charts/opensearch-dashboards/templates/deployment.yaml#L122
+opensearchHosts: ""
 extraEnvs:
   - name: OPENSEARCH_HOSTS
     valueFrom:

docs/modules/opensearch/examples/getting_started/opensearch-dashboards-values.yaml.j2

@@ -21,6 +21,8 @@ config:
     opensearch_security:
       cookie:
         secure: true
+# See https://github.com/opensearch-project/helm-charts/blob/main/charts/opensearch-dashboards/templates/deployment.yaml#L122
+opensearchHosts: ""
 extraEnvs:
   - name: OPENSEARCH_HOSTS
     valueFrom:

tests/templates/kuttl/opensearch-dashboards/20_opensearch-dashboards-values.yaml.j2

@@ -8,6 +8,9 @@ serviceAccount:
   # Use the ServiceAccount of OpenSearch because its permissions are already configured to work on
   # OpenShift.
   name: opensearch-serviceaccount
+# OPENSEARCH_HOSTS cannot be supplied if opensearchHosts is set (so unset explicitly).
+# See https://github.com/opensearch-project/helm-charts/blob/main/charts/opensearch-dashboards/templates/deployment.yaml#L122
+opensearchHosts: ""
 extraEnvs:
   - name: OPENSEARCH_HOSTS
     valueFrom: