Mark tests as skipped until Roslyn APIs are available

Co-authored-by: 333fred <[email protected]>

Author: Copilot

src/Microsoft.CodeAnalysis.NetAnalyzers/tests/Microsoft.CodeAnalysis.NetAnalyzers.UnitTests/Microsoft.NetCore.Analyzers/Runtime/DetectPreviewFeatureUnitTests.Misc.cs

@@ -837,7 +837,7 @@ async Task M()
             await test.RunAsync();
         }
 
-        [Fact]
+        [Fact(Skip = "Requires Roslyn APIs from https://github.com/dotnet/roslyn/pull/80455")]
         public async Task VerifyRuntimeAsyncAwaitUsingDeclarationReportsDiagnostic()
         {
             var csInput = """
@@ -876,7 +876,7 @@ class MemoryStream : IAsyncDisposable
             await test.RunAsync();
         }
 
-        [Fact]
+        [Fact(Skip = "Requires Roslyn APIs from https://github.com/dotnet/roslyn/pull/80455")]
         public async Task VerifyRuntimeAsyncAwaitUsingStatementReportsDiagnostic()
         {
             var csInput = """
@@ -917,7 +917,7 @@ class MemoryStream : IAsyncDisposable
             await test.RunAsync();
         }
 
-        [Fact]
+        [Fact(Skip = "Requires Roslyn APIs from https://github.com/dotnet/roslyn/pull/80455")]
         public async Task VerifyRuntimeAsyncAwaitForeachReportsDiagnostic()
         {
             var csInput = """