LYN-7655 Fix Race Condition When Launching at Editor-Server (#4946)

* Fix a race condition where the editor tries to connect to the editor-server before the editor-server is ready (originally discovered on lower-spec Jenkin machines).  Change editor-server so that editor waits to receive a EditorServerReadyForInit before trying to send all the level data.

* The editor might not be the connector so make sure to connect to the actual MP simulation even if the editor isn't the editor-server connect (if editorsv_launch=true then the editor-server will connect to the editor)

* Adding warnings if MPEditorConnection cannot find certain cvars

Signed-off-by: Gene Walters <genewalt@amazon.com>

Gems/Multiplayer/Code/Include/Multiplayer/MultiplayerEditorServerBus.h

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#pragma once
+
+#include <AzCore/EBus/EBus.h>
+
+namespace Multiplayer
+{
+    class MultiplayerEditorServerRequests : public AZ::EBusTraits
+    {
+    public:
+        static const AZ::EBusHandlerPolicy HandlerPolicy = AZ::EBusHandlerPolicy::Single;
+        static const AZ::EBusAddressPolicy AddressPolicy = AZ::EBusAddressPolicy::Single;
+        
+        //! Sends a packet that initializes a local server launched from the editor.
+        //! The editor will package the data required for loading the current editor level on the editor-server; data includes entities and asset data.
+        //! @param connection The connection to the editor-server
+        virtual void SendEditorServerLevelDataPacket(AzNetworking::IConnection* connection) = 0;
+    };
+    using MultiplayerEditorServerRequestBus = AZ::EBus<MultiplayerEditorServerRequests>;
+} // namespace Multiplayer