Migrate types required for client interceptors to Grpc.Core.Api

src/csharp/Grpc.Core/ForwardedTypes.cs

@@ -36,6 +36,7 @@ using Grpc.Core.Utils;
 [assembly:TypeForwardedToAttribute(typeof(CallCredentials))]
 [assembly:TypeForwardedToAttribute(typeof(CallFlags))]
 [assembly:TypeForwardedToAttribute(typeof(CallInvoker))]
+[assembly:TypeForwardedToAttribute(typeof(CallInvokerExtensions))]
 [assembly:TypeForwardedToAttribute(typeof(CallOptions))]
 [assembly:TypeForwardedToAttribute(typeof(ClientInterceptorContext<,>))]
 [assembly:TypeForwardedToAttribute(typeof(ContextPropagationOptions))]
@@ -45,6 +46,7 @@ using Grpc.Core.Utils;
 [assembly:TypeForwardedToAttribute(typeof(IAsyncStreamWriter<>))]
 [assembly:TypeForwardedToAttribute(typeof(IClientStreamWriter<>))]
 [assembly:TypeForwardedToAttribute(typeof(Interceptor))]
+[assembly:TypeForwardedToAttribute(typeof(InterceptingCallInvoker))]
 [assembly:TypeForwardedToAttribute(typeof(IServerStreamWriter<>))]
 [assembly:TypeForwardedToAttribute(typeof(Marshaller<>))]
 [assembly:TypeForwardedToAttribute(typeof(Marshallers))]