refactor(config): remove legacy config reference handling and streamline YAML management

- Deleted legacy config reference handling functions and related migration scripts to simplify the codebase.
- Updated documentation to reflect the removal of legacy YAML paths and configurations.
- Adjusted existing YAML management processes to ensure compatibility with the new mustache-style syntax.
- Removed tests related to legacy config references, focusing on current functionality and ensuring clarity in the testing suite.

packages/server/package.json

@@ -18,8 +18,7 @@
     "reset-admin": "node reset-admin.js",
     "test:profiles": "node test/profiles-smoke.js",
     "test:set-dry-run": "node test/set-dry-run-smoke.js",
-    "test:config-refs": "node test/config-refs-smoke.js",
-    "test:owner-migrate": "node test/owner-migrate-smoke.js"
+    "test:config-refs": "node test/config-refs-smoke.js"
   },
   "dependencies": {
     "@jerapah-flow/shared": "workspace:*",