Restore #pragma warning disable lines that were accidentally removed

- Restore all #pragma warning disable directives in ChatClientIntegrationTests.cs
- Restore all #pragma warning disable directives in EmbeddingGeneratorIntegrationTests.cs
- Fix System using directives alphabetical ordering (System before System.*)
- Maintain proper using grouping per StyleCop SA1210 requirements

Co-authored-by: adamsitnik <6011991+adamsitnik@users.noreply.github.com>

Author: Copilot

test/Libraries/Microsoft.Extensions.AI.Integration.Tests/ChatClientIntegrationTests.cs

@@ -1,27 +1,36 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System;
 using System.Collections.Generic;
-using System.ComponentModel.DataAnnotations;
 using System.ComponentModel;
-using System.Diagnostics.CodeAnalysis;
+using System.ComponentModel.DataAnnotations;
 using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using System.Reflection;
+using System.Text;
 using System.Text.Json;
 using System.Text.RegularExpressions;
-using System.Text;
-using System.Threading.Tasks;
 using System.Threading;
-using System;
+using System.Threading.Tasks;
 
 using Microsoft.DotNet.XUnitExtensions;
 using Microsoft.Extensions.Caching.Distributed;
 using Microsoft.Extensions.Caching.Memory;
-using Microsoft.Extensions.Logging.Testing;
 using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Logging.Testing;
 using OpenTelemetry.Trace;
 using Xunit;
+
+#pragma warning disable CA2000 // Dispose objects before losing scope
+#pragma warning disable CA2214 // Do not call overridable methods in constructors
+#pragma warning disable CA2249 // Consider using 'string.Contains' instead of 'string.IndexOf'
+#pragma warning disable S103 // Lines should not be too long
+#pragma warning disable S1144 // Unused private types or members should be removed
+#pragma warning disable S3604 // Member initializer values should not be redundant
+#pragma warning disable SA1515 // Single-line comment should be preceded by blank line
+
 namespace Microsoft.Extensions.AI;
 
 public abstract class ChatClientIntegrationTests : IDisposable

test/Libraries/Microsoft.Extensions.AI.Integration.Tests/EmbeddingGeneratorIntegrationTests.cs

@@ -1,24 +1,29 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System;
 #if NET
 using System.Collections;
 #endif
-#if NET
-using System.Numerics.Tensors;
-#endif
 using System.Collections.Generic;
-using System.Diagnostics.CodeAnalysis;
 using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
+
+#if NET
+using System.Numerics.Tensors;
+#endif
 using System.Threading.Tasks;
-using System;
 
 using Microsoft.DotNet.XUnitExtensions;
 using Microsoft.Extensions.Caching.Distributed;
 using Microsoft.Extensions.Caching.Memory;
 using OpenTelemetry.Trace;
 using Xunit;
+
+#pragma warning disable CA2214 // Do not call overridable methods in constructors
+#pragma warning disable S3967  // Multidimensional arrays should not be used
+
 namespace Microsoft.Extensions.AI;
 
 public abstract class EmbeddingGeneratorIntegrationTests : IDisposable