[Feature] Voice reconnection and resuming (#2873)

* Voice receive fix (use system-selected port)

* Update SocketGuild.cs

* Reconnect voice after moved, resume voice connection, don't invoke Disconnected event when is going to reconnect

* no more collection primitives

* Disconnected event rallback & dispose audio client after finished

* Update src/Discord.Net.WebSocket/Audio/AudioClient.cs

* Update src/Discord.Net.WebSocket/Audio/AudioClient.cs

---------

src/Discord.Net.WebSocket/DiscordVoiceApiClient.cs

@@ -166,6 +166,16 @@ namespace Discord.Audio
             });
         }
 
+        public Task SendResume(string token, string sessionId)
+        {
+            return SendAsync(VoiceOpCode.Resume, new ResumeParams
+            {
+                ServerId = GuildId,
+                SessionId = sessionId,
+                Token = token
+            });
+        }
+
         public async Task ConnectAsync(string url)
         {
             await _connectionLock.WaitAsync().ConfigureAwait(false);