enable new mpg emitter for dell (#37799)

Author: live1206

specification/dell/Dell.Storage.Management/tspconfig.yaml

@@ -14,12 +14,9 @@ options:
     azure-resource-provider-folder: "resource-manager"
     output-file: "{azure-resource-provider-folder}/{service-name}/{version-status}/{version}/Dell.Storage.json"
     examples-dir: "{project-root}/examples"
-  "@azure-tools/typespec-csharp":
-    clear-output-folder: true
-    model-namespace: true
+  "@azure-typespec/http-client-csharp-mgmt":
     namespace: "Azure.ResourceManager.Dell.Storage"
-    flavor: azure
-    emitter-output-dir: "{output-dir}/{service-dir}/{namespace}"
+    emitter-output-dir: "{output-dir}/sdk/dellstorage/{namespace}"
   "@azure-tools/typespec-python":
     emitter-output-dir: "{output-dir}/{service-dir}/azure-mgmt-dellstorage"
     namespace: "azure.mgmt.dellstorage"