Skip MVC template tests on HelixQueueArmDebian12 (#59295)

src/ProjectTemplates/test/Templates.Mvc.Tests/Templates.Mvc.Tests.csproj

@@ -24,6 +24,7 @@
     <!-- These tests fail in Helix in Debian and Mariner due to error -901 -->
     <!-- Disabling on those OSes until a better fix can be identified -->
     <SkipHelixQueues>
+      $(HelixQueueArmDebian12);
       $(HelixQueueDebian11);
       $(HelixQueueMariner);
       $(SkipHelixQueues)