test

- Adding `NetworkSceneManagerStartupTests` which validates this PR.
- Adding the assets and script needed to validate this PR.
- Updated scenes in build list to include the new scene: InSceneNetworkObjectMovesToDDOL.

Author: NoelStephensUnity

testproject/Assets/Tests/Manual/IntegrationTestScenes/InSceneNetworkObjectMovesToDDOL.unity

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testproject/Assets/Tests/Manual/IntegrationTestScenes/InSceneNetworkObjectMovesToDDOL.unity.meta

@@ -0,0 +1,34 @@
+using Unity.Netcode;
+using UnityEngine;
+
+namespace TestProject.ManualTests
+{
+    public class MoveInScenePlacedToDDOL : NetworkBehaviour
+    {
+        public bool ProcessedRpc { get; private set; }
+
+        private void Awake()
+        {
+            ProcessedRpc = false;
+            var networkObject = GetComponent<NetworkObject>();
+            Debug.Log($"[{name}][Moving to DDOL] InScenePlaced: {networkObject.InScenePlaced}");
+            DontDestroyOnLoad(gameObject);
+        }
+
+        protected override void OnNetworkPostSpawn()
+        {
+            if (HasAuthority)
+            {
+                SendOnSpawnRpc();
+            }
+
+            base.OnNetworkPostSpawn();
+        }
+
+        [Rpc(SendTo.Everyone)]
+        private void SendOnSpawnRpc(RpcParams rpcParams = default)
+        {
+            ProcessedRpc = true;
+        }
+    }
+}