[containerservicesafeguards] Create client.tsp (#35405)

* Create client.tsp

* Update client.tsp

Author: ChenxiJiang333

specification/containerservice/DeploymentSafeguards.Management/client.tsp

@@ -0,0 +1,9 @@
+import "./main.tsp";
+import "@azure-tools/typespec-client-generator-core";
+
+using Azure.ClientGenerator.Core;
+
+@@clientName(Microsoft.ContainerService,
+  "ContainerServiceSafeguardsMgmtClient",
+  "python"
+);