Moves DelayedQuery{T} form Internals

DelayedScalarQuery{T} is in Xtensive.Orm but
DelayedQuery{T} is in Xtensive.Orm.Internals.
Both types are directly accesible.

Author: alex-kulakov

Orm/Xtensive.Orm/Core/Extensions/EnumerableExtensions.cs

@@ -1,4 +1,4 @@
-// Copyright (C) 2008-2020 Xtensive LLC.
+// Copyright (C) 2008-2021 Xtensive LLC.
 // This code is distributed under MIT license terms.
 // See the License.txt file in the project root for more information.
 // Created by: Alex Yakunin
@@ -14,7 +14,7 @@
 using System.Threading.Tasks;
 using Xtensive.Collections;
 using Xtensive.Collections.Graphs;
-using Xtensive.Orm.Internals;
+using Xtensive.Orm;
 
 
 namespace Xtensive.Core

Orm/Xtensive.Orm/Orm/DelayedQuery{T}.cs

@@ -1,4 +1,4 @@
-// Copyright (C) 2009-2020 Xtensive LLC.
+// Copyright (C) 2009-2021 Xtensive LLC.
 // This code is distributed under MIT license terms.
 // See the License.txt file in the project root for more information.
 // Created by: Alexander Nikolaev
@@ -10,9 +10,10 @@
 using System.Threading;
 using System.Threading.Tasks;
 using Xtensive.Core;
+using Xtensive.Orm.Internals;
 using Xtensive.Orm.Linq;
 
-namespace Xtensive.Orm.Internals
+namespace Xtensive.Orm
 {
   /// <summary>
   /// Represents a delayed sequence query (query where result can be enumerated after an execution).