[release/10.0] [Blazor] Skip tests in ThreadingHostedAppTest and ThreadingAppTest (#63537)

* Initial plan

* Skip Threading tests due to unreliability - replace QuarantinedTest with Skip attributes

Co-authored-by: javiercn <[email protected]>

* Simplify skip messages to use only URL as requested

Co-authored-by: javiercn <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: javiercn <[email protected]>

Author: 3 people

src/Components/test/E2ETest/Tests/ThreadingAppHostedTest.cs

@@ -32,15 +32,13 @@ protected override void InitializeAsyncCore()
         WaitUntilLoaded();
     }
 
-    [Fact]
-    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/54761")]
+    [Fact(Skip = "https://github.com/dotnet/aspnetcore/issues/63524")]
     public void HasHeading()
     {
         Assert.Equal("Hello, world!", Browser.Exists(By.TagName("h1")).Text);
     }
 
-    [Fact]
-    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/54761")]
+    [Fact(Skip = "https://github.com/dotnet/aspnetcore/issues/63524")]
     public void NavMenuHighlightsCurrentLocation()
     {
         var activeNavLinksSelector = By.CssSelector(".sidebar a.active");
@@ -66,8 +64,7 @@ public void NavMenuHighlightsCurrentLocation()
             item => Assert.Equal("Home", item.Text.Trim()));
     }
 
-    [Fact]
-    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/54761")]
+    [Fact(Skip = "https://github.com/dotnet/aspnetcore/issues/63524")]
     public void CounterPageCanUseThreads()
     {
         // Navigate to "Counter"
@@ -84,8 +81,7 @@ public void CounterPageCanUseThreads()
         Browser.NotEqual("Current count: 0", () => Browser.Exists(By.CssSelector("h1 + p")).Text);
     }
 
-    [Fact]
-    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/54761")]
+    [Fact(Skip = "https://github.com/dotnet/aspnetcore/issues/63524")]
     public void HasFetchDataPage()
     {
         // Navigate to "Fetch data"

src/Components/test/E2ETest/Tests/ThreadingAppTest.cs

@@ -28,22 +28,19 @@ protected override void InitializeAsyncCore()
         WaitUntilLoaded();
     }
 
-    [Fact]
-    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/54761")]
+    [Fact(Skip = "https://github.com/dotnet/aspnetcore/issues/63524")]
     public void HasTitle()
     {
         Assert.Equal("Blazor standalone", Browser.Title);
     }
 
-    [Fact]
-    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/54761")]
+    [Fact(Skip = "https://github.com/dotnet/aspnetcore/issues/63524")]
     public void HasHeading()
     {
         Assert.Equal("Hello, world!", Browser.Exists(By.TagName("h1")).Text);
     }
 
-    [Fact]
-    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/54497")]
+    [Fact(Skip = "https://github.com/dotnet/aspnetcore/issues/63524")]
     public void NavMenuHighlightsCurrentLocation()
     {
         var activeNavLinksSelector = By.CssSelector(".sidebar a.active");
@@ -69,8 +66,7 @@ public void NavMenuHighlightsCurrentLocation()
             item => Assert.Equal("Home", item.Text.Trim()));
     }
 
-    [Fact]
-    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/58242")]
+    [Fact(Skip = "https://github.com/dotnet/aspnetcore/issues/63524")]
     public void CounterPageCanUseThreads()
     {
         // Navigate to "Counter"
@@ -87,8 +83,7 @@ public void CounterPageCanUseThreads()
         Browser.NotEqual("Current count: 0", () => Browser.Exists(By.CssSelector("h1 + p")).Text);
     }
 
-    [Fact]
-    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/54761")]
+    [Fact(Skip = "https://github.com/dotnet/aspnetcore/issues/63524")]
     public void HasFetchDataPage()
     {
         // Navigate to "Fetch data"
@@ -109,8 +104,7 @@ public void HasFetchDataPage()
         }
     }
 
-    [Fact]
-    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/54761")]
+    [Fact(Skip = "https://github.com/dotnet/aspnetcore/issues/63524")]
     public void IsStarted()
     {
         // Read from property