rename PortalServices for .NET SDK (#34155)

Author: live1206

specification/portalservices/CopilotSettings.Management/client.tsp

@@ -2,6 +2,7 @@ import "./main.tsp";
 import "@azure-tools/typespec-client-generator-core";
 
 using Azure.ClientGenerator.Core;
+using Microsoft.PortalServices;
 
 @@clientName(Microsoft.PortalServices,
   "PortalServicesCopilotMgmtClient",
@@ -12,3 +13,18 @@ using Azure.ClientGenerator.Core;
   "PortalServicesCopilotMgmtClient",
   "java"
 );
+
+@@clientName(Azure.ResourceManager.ResourceProvisioningState,
+  "PortalServicesResourceProvisioningState",
+  "csharp"
+);
+
+@@clientName(CopilotSettingsResource,
+  "PortalServicesCopilotSettings",
+  "csharp"
+);
+
+@@clientName(CopilotSettingsProperties,
+  "PortalServicesCopilotSettingsProperties ",
+  "csharp"
+);