Quarantine error notification tests (#50378)

Author: MackinnonBuck

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

@@ -5,6 +5,7 @@
 using Microsoft.AspNetCore.Components.E2ETest.Infrastructure;
 using Microsoft.AspNetCore.Components.E2ETest.Infrastructure.ServerFixtures;
 using Microsoft.AspNetCore.E2ETesting;
+using Microsoft.AspNetCore.Testing;
 using OpenQA.Selenium;
 using Xunit.Abstractions;
 
@@ -31,6 +32,7 @@ protected override void InitializeAsyncCore()
     }
 
     [Fact]
+    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/50377")]
     public void ShowsErrorNotification_OnError_Dismiss()
     {
         var errorUi = Browser.Exists(By.Id("blazor-error-ui"));
@@ -48,6 +50,7 @@ public void ShowsErrorNotification_OnError_Dismiss()
     }
 
     [Fact]
+    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/50377")]
     public void ShowsErrorNotification_OnError_Reload()
     {
         var causeErrorButton = Browser.Exists(By.Id("throw-simple-exception"));