chore: Fix build errors

Author: Youssef1313

src/SourceGenerators/Uno.UI.SourceGenerators.Tests/Verifiers/CSGenerator.cs

@@ -12,9 +12,7 @@ namespace Uno.UI.SourceGenerators.Tests.Verifiers
 	public static partial class CSharpSourceGeneratorVerifier<TSourceGenerator>
 		where TSourceGenerator : ISourceGenerator, new()
 	{
-#pragma warning disable CS0618 // Type or member is obsolete
-		public class Test : CSharpSourceGeneratorTest<TSourceGenerator>
-#pragma warning restore CS0618 // Type or member is obsolete
+		public class Test : CSharpSourceGeneratorTest<TSourceGenerator, DefaultVerifier>
 		{
 			public LanguageVersion LanguageVersion { get; set; } = LanguageVersion.Default;
 			public bool IgnoreAccessibility { get; set; }

src/Uno.Analyzers.Tests/Verifiers/CSCodeFix+Test.cs

@@ -5,6 +5,7 @@
 using Microsoft.CodeAnalysis.CSharp;
 using Microsoft.CodeAnalysis.CSharp.Testing;
 using Microsoft.CodeAnalysis.Diagnostics;
+using Microsoft.CodeAnalysis.Testing;
 
 namespace Uno.Analyzers.Tests.Verifiers
 {
@@ -13,7 +14,7 @@ public static partial class CSharpCodeFixVerifier<TAnalyzer, TCodeFix>
 		where TAnalyzer : DiagnosticAnalyzer, new()
 		where TCodeFix : CodeFixProvider, new()
 	{
-		public class Test : CSharpCodeFixTest<TAnalyzer, TCodeFix>
+		public class Test : CSharpCodeFixTest<TAnalyzer, TCodeFix, DefaultVerifier>
 		{
 			public Test()
 			{