Quarantine a couple IIS tests (#41741)

Author: BrennanConroy

src/Servers/IIS/IIS/test/Common.LongTests/ShutdownTests.cs

@@ -371,6 +371,7 @@ private async Task AppOfflineAddAndRemovedStress(HostingModel hostingModel)
     }
 
     [ConditionalFact]
+    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/40628")]
     public async Task ConfigurationChangeStopsInProcess()
     {
         var deploymentParameters = Fixture.GetBaseDeploymentParameters(HostingModel.InProcess);

src/Servers/IIS/IIS/test/IIS.ShadowCopy.Tests/ShadowCopyTests.cs

@@ -74,6 +74,7 @@ public async Task ShadowCopyRelativeInSameDirectoryWorks()
     }
 
     [ConditionalFact]
+    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/40628")]
     public async Task ShadowCopyRelativeOutsideDirectoryWorks()
     {
         using var directory = TempDirectory.Create();