renaming dms and splitting rocketmq to new service

Reviewed-by: Gode, Sebastian <sebastian.gode@t-systems.com>
Co-authored-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-committed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>

otc_metadata/data/repositories/dms-rocketmq.yaml

@@ -0,0 +1,13 @@
+---
+service_type: dms_rocketmq
+repositories:
+  - environment: public
+    repo: opentelekomcloud-docs/distributed-message-service-rocketmq
+    type: github
+    cloud_environments:
+      - eu_de
+  - environment: internal
+    repo: docs/distributed-message-service-rocketmq
+    type: gitea
+    cloud_environments:
+      - eu_de