Quarantine ServerRoutingTest.CanNavigateToQueryStringPageWithNoQuery (#66196)

The server-execution variant of CanNavigateToQueryStringPageWithNoQuery has
failed 2 times across 2 different builds in the components-e2e pipeline
(builds 1366214 and 1358072). The base class test (RoutingTest) passes
consistently; only the server-execution (Blazor Server) variant is flaky.

To quarantine only the server variant, made the base method virtual and
added a quarantined override in ServerRoutingTest in TestSubclasses.cs.

Associated issue: https://github.com/dotnet/aspnetcore/issues/#aw_navqry1

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: William Godbe <wigodbe@microsoft.com>

Author: 3 people

src/Components/test/E2ETest/ServerExecutionTests/TestSubclasses.cs

@@ -47,6 +47,10 @@ public ServerRoutingTest(BrowserFixture browserFixture, ToggleExecutionModeServe
     [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/61080")]
     public override void NavigationLock_OverlappingNavigationsCancelExistingNavigations_HistoryNavigation()
         => base.NavigationLock_OverlappingNavigationsCancelExistingNavigations_HistoryNavigation();
+
+    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/#aw_navqry1")]
+    public override void CanNavigateToQueryStringPageWithNoQuery()
+        => base.CanNavigateToQueryStringPageWithNoQuery();
 }
 
 public class ServerCascadingValueTest : CascadingValueTest

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

@@ -1591,7 +1591,7 @@ public void CanArriveAtQueryStringPageWithDateTimeQuery()
     }
 
     [Fact]
-    public void CanNavigateToQueryStringPageWithNoQuery()
+    public virtual void CanNavigateToQueryStringPageWithNoQuery()
     {
         SetUrlViaPushState("/");