Move [Layout]

This will be coordinated with the equivalent change in the runtime repo.
\n\nCommit migrated from c82d53eaaa

src/Razor/Microsoft.AspNetCore.Razor.Language/src/Components/ComponentsApi.cs

@@ -28,7 +28,7 @@ namespace Microsoft.AspNetCore.Razor.Language.Components
 
         public static class LayoutAttribute
         {
-            public static readonly string FullTypeName = "Microsoft.AspNetCore.Components.Layouts.LayoutAttribute";
+            public static readonly string FullTypeName = "Microsoft.AspNetCore.Components.LayoutAttribute";
         }
 
         public static class InjectAttribute

src/Razor/Microsoft.AspNetCore.Razor.Language/test/IntegrationTests/ComponentDirectiveIntegrationTest.cs

@@ -6,7 +6,6 @@ using System.Linq;
 using System.Reflection;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Components;
-using Microsoft.AspNetCore.Components.Layouts;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CSharp;
 using Xunit;

src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentImports/_Imports.codegen.cs

@@ -22,7 +22,7 @@ using System.Reflection;
 #line default
 #line hidden
 #nullable disable
-    [Microsoft.AspNetCore.Components.Layouts.LayoutAttribute(typeof(MainLayout))]
+    [Microsoft.AspNetCore.Components.LayoutAttribute(typeof(MainLayout))]
     public class _Imports : System.Object
     {
         #pragma warning disable 219

src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentImports/_Imports.ir.txt

@@ -8,7 +8,7 @@ Document -
         UsingDirective - (1:0,1 [17] x:\dir\subdir\Test\_Imports.razor) - System.Text
         UsingDirective - (21:1,1 [23] x:\dir\subdir\Test\_Imports.razor) - System.Reflection
         CSharpCode - 
-            IntermediateToken -  - CSharp - [Microsoft.AspNetCore.Components.Layouts.LayoutAttribute(typeof(MainLayout))]
+            IntermediateToken -  - CSharp - [Microsoft.AspNetCore.Components.LayoutAttribute(typeof(MainLayout))]
         ClassDeclaration -  - public - _Imports - System.Object - 
             DesignTimeDirective - 
                 DirectiveToken - (56:3,8 [10] x:\dir\subdir\Test\_Imports.razor) - MainLayout

src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentImports/_Imports.mappings.txt

@@ -10,11 +10,11 @@ Generated Location: (448:19,0 [23] )
 
 Source Location: (56:3,8 [10] x:\dir\subdir\Test\_Imports.razor)
 |MainLayout|
-Generated Location: (849:32,0 [10] )
+Generated Location: (841:32,0 [10] )
 |MainLayout|
 
 Source Location: (69:4,1 [3] x:\dir\subdir\Test\_Imports.razor)
 |Foo|
-Generated Location: (1300:49,6 [3] )
+Generated Location: (1292:49,6 [3] )
 |Foo|
 

src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentImports/_Imports.codegen.cs

@@ -22,7 +22,7 @@ using System.Reflection;
 #line default
 #line hidden
 #nullable disable
-    [Microsoft.AspNetCore.Components.Layouts.LayoutAttribute(typeof(MainLayout))]
+    [Microsoft.AspNetCore.Components.LayoutAttribute(typeof(MainLayout))]
     public class _Imports : System.Object
     {
         #pragma warning disable 1998

src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentImports/_Imports.ir.txt

@@ -8,7 +8,7 @@ Document -
         UsingDirective - (1:0,1 [19] x:\dir\subdir\Test\_Imports.razor) - System.Text
         UsingDirective - (21:1,1 [25] x:\dir\subdir\Test\_Imports.razor) - System.Reflection
         CSharpCode - 
-            IntermediateToken -  - CSharp - [Microsoft.AspNetCore.Components.Layouts.LayoutAttribute(typeof(MainLayout))]
+            IntermediateToken -  - CSharp - [Microsoft.AspNetCore.Components.LayoutAttribute(typeof(MainLayout))]
         ClassDeclaration -  - public - _Imports - System.Object - 
             MethodDeclaration -  - protected - void - Execute
                 CSharpExpression - (69:4,1 [3] x:\dir\subdir\Test\_Imports.razor)

src/Razor/test/Microsoft.AspNetCore.Razor.Test.ComponentShim/Microsoft.AspNetCore.Components.netstandard2.0.cs

@@ -656,7 +656,7 @@ namespace Microsoft.AspNetCore.Components.Forms
         internal ValidationStateChangedEventArgs() { }
     }
 }
-namespace Microsoft.AspNetCore.Components.Layouts
+namespace Microsoft.AspNetCore.Components
 {
     [System.AttributeUsageAttribute(System.AttributeTargets.Class, AllowMultiple=false, Inherited=true)]
     public partial class LayoutAttribute : System.Attribute