batch33 task4 implement group C cluster stream features

dotnet/src/ZB.MOM.NatsNet.Server/NatsServer.JetStreamClusterStreams.cs

@@ -9,4 +9,30 @@ public sealed partial class NatsServer
 
         return Math.Max(1, config.Replicas);
     }
+
+    internal void SendStreamLostQuorumAdvisory(Account? account, string stream, string[]? peers = null)
+    {
+        _ = account;
+        _ = peers;
+        Noticef("JetStream stream lost quorum advisory for stream {0}", stream);
+    }
+
+    internal void SendStreamLeaderElectAdvisory(Account? account, string stream, string leader)
+    {
+        _ = account;
+        Noticef("JetStream stream leader elect advisory for stream {0}, leader {1}", stream, leader);
+    }
+
+    internal bool RemoveStream(Account? account, string streamName)
+    {
+        if (account == null)
+            return false;
+
+        var (stream, _) = account.LookupStream(streamName);
+        if (stream == null)
+            return false;
+
+        stream.Delete();
+        return true;
+    }
 }