[EGv2] client.tsp addition for internal functions (#26473)

* client

* update client

* remove convenience line

Author: l0lawrence

specification/eventgrid/Azure.Messaging.EventGrid/client.tsp

@@ -0,0 +1,8 @@
+import "@azure-tools/typespec-client-generator-core";
+import "./main.tsp";
+
+using Azure.ClientGenerator.Core;
+
+@@access(Microsoft.EventGrid.publishCloudEvent, Access.internal);
+@@access(Microsoft.EventGrid.publishCloudEvents, Access.internal);
+@@access(Microsoft.EventGrid.receiveCloudEvents, Access.internal);

specification/eventgrid/Azure.Messaging.EventGrid/tspconfig.yaml

@@ -26,5 +26,4 @@ options:
   "@azure-tools/typespec-csharp":
     package-dir: Azure.Messaging.EventGridV2
     model-namespace: false
-    generate-convenience-methods: false
     namespace: Azure.Messaging.EventGrid.Namespaces