[mono] Disable DoublinkList/dlstack tests

This test is disabled in main and this change makes its way back to 6.0

Fixes dotnet#83245

Author: Steve Pfister

src/tests/issues.targets

@@ -1123,6 +1123,9 @@
         <ExcludeList Include="$(XunitTestBinBase)/GC/Scenarios/DoublinkList/doublinknoleak2/**">
             <Issue>PlatformDetection.IsPreciseGcSupported false on mono</Issue>
         </ExcludeList>
+        <ExcludeList Include="$(XunitTestBinBase)/GC/Scenarios/DoublinkList/dlstack/**">
+            <Issue>PlatformDetection.IsPreciseGcSupported false on mono</Issue>
+        </ExcludeList>
         <ExcludeList Include="$(XunitTestBinBase)/GC/Scenarios/DoublinkList/dlcollect/**">
             <Issue>PlatformDetection.IsPreciseGcSupported false on mono</Issue>
         </ExcludeList>