Use actual OpenSearch

Author: jissereitsma

.github/workflows/integration-tests.yml

@@ -18,7 +18,7 @@ jobs:
           MYSQL_DATABASE: magento2
         options: --tmpfs /tmp:rw --tmpfs /var/lib/mysql:rw --health-cmd="mysqladmin ping"
       opensearch:
-        image: yireo/opensearch-dummy
+        image: yireo/opensearch
         env:
           'discovery.type': single-node
           #'xpack.security.enabled': false