Revert "Remove OBS native SCM workflow, use shared GitHub Actions release workflow instead"

This reverts commit 896ec5b.

Author: AdrianTM

.obs/workflows.yml

@@ -0,0 +1,7 @@
+workflow:
+  steps:
+    - trigger_services:
+        project: home:mx-packaging
+        package: "%{SCM_REPOSITORY_NAME}"
+  filters:
+    event: tag_push