Bump to latest MTG (Azure#50464)

* Bump to latest MTG

* Fix unit test

* Bump dep

Author: JoshLove-msft

eng/Packages.Data.props

@@ -442,7 +442,7 @@
 
   <PropertyGroup>
     <TestProxyVersion>1.0.0-dev.20250501.1</TestProxyVersion>
-    <UnbrandedGeneratorVersion>1.0.0-alpha.20250604.3</UnbrandedGeneratorVersion>
+    <UnbrandedGeneratorVersion>1.0.0-alpha.20250606.4</UnbrandedGeneratorVersion>
     <AzureGeneratorVersion>1.0.0-alpha.20250527.2</AzureGeneratorVersion>
   </PropertyGroup>
 </Project>

eng/packages/http-client-csharp/generator/Azure.Generator/src/Primitives/NewAzureProjectScaffolding.cs

@@ -40,7 +40,7 @@ protected override string GetSourceProjectFileContent()
             int pathSegmentCount = GetPathSegmentCount();
             if (AzureClientGenerator.Instance.InputLibrary.InputNamespace.Auth?.ApiKey is not null)
             {
-                builder.CompileIncludes.Add(new CSharpProjectWriter.CSProjCompileInclude(GetCompileInclude("AzureKeyCredentialPolicy.cs", pathSegmentCount), SharedSourceLinkBase));
+                builder.CompileIncludes.Add(new CSharpProjectCompileInclude(GetCompileInclude("AzureKeyCredentialPolicy.cs", pathSegmentCount), SharedSourceLinkBase));
             }
 
             bool hasOperation = false;
@@ -54,15 +54,15 @@ protected override string GetSourceProjectFileContent()
             {
                 foreach (var file in _operationSharedFiles)
                 {
-                    builder.CompileIncludes.Add(new CSharpProjectWriter.CSProjCompileInclude(GetCompileInclude(file, pathSegmentCount), SharedSourceLinkBase));
+                    builder.CompileIncludes.Add(new CSharpProjectCompileInclude(GetCompileInclude(file, pathSegmentCount), SharedSourceLinkBase));
                 }
             }
 
             if (hasLongRunningOperation)
             {
                 foreach (var file in _lroSharedFiles)
                 {
-                    builder.CompileIncludes.Add(new CSharpProjectWriter.CSProjCompileInclude(GetCompileInclude(file, pathSegmentCount), SharedSourceLinkBase));
+                    builder.CompileIncludes.Add(new CSharpProjectCompileInclude(GetCompileInclude(file, pathSegmentCount), SharedSourceLinkBase));
                 }
             }
 

eng/packages/http-client-csharp/generator/Azure.Generator/src/Visitors/ModelFactoryVisitor.cs

@@ -13,7 +13,7 @@ internal class ModelFactoryVisitor : ScmLibraryVisitor
         {
             if (type is ModelFactoryProvider && type.CustomCodeView == null)
             {
-                type.Type.Update(name: $"{TypeNameUtilities.GetResourceProviderName()}ModelFactory");
+                type.Update(name: $"{TypeNameUtilities.GetResourceProviderName()}ModelFactory");
             }
 
             return type;

eng/packages/http-client-csharp/generator/Azure.Generator/src/Visitors/NamespaceVisitor.cs

@@ -54,7 +54,7 @@ private static void UpdateModelsNamespace(TypeProvider type)
         {
             if (AzureClientGenerator.Instance.Configuration.UseModelNamespace())
             {
-                type.Type.Update(
+                type.Update(
                     @namespace: AzureClientGenerator.Instance.TypeFactory.GetCleanNameSpace(
                         $"{AzureClientGenerator.Instance.TypeFactory.PrimaryNamespace}.Models"));
             }

eng/packages/http-client-csharp/generator/Azure.Generator/test/Visitors/LroVisitorTests.cs

@@ -136,10 +136,11 @@ public void UpdatesExplicitOperatorToUseResultSegment()
                     InputPrimitiveType.String,
                     kind: InputParameterKind.Method)
             ];
+            var responseModel = InputFactory.Model("foo");
             var lro = InputFactory.Operation(
                 "foo",
-                parameters: parameters);
-            var responseModel = InputFactory.Model("foo");
+                parameters: parameters,
+                responses: [InputFactory.OperationResponse(bodytype: responseModel)]);
             var lroServiceMethod = InputFactory.LongRunningServiceMethod(
                 "foo",
                 lro,