Conditionally disable tests that depend on cxx11_future flag

Task-number: QTBUG-88392
Change-Id: Ic8451ca4052ec4a94f0d78307e1b32965eb18c4e
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>

tests/auto/other/qobjectrace/tst_qobjectrace.cpp

@@ -334,6 +334,9 @@ private:
 
 void tst_QObjectRace::blockingQueuedDestroyRace()
 {
+#if !QT_CONFIG(cxx11_future)
+    QSKIP("This test requires QThread::create");
+#else
     enum { MinIterations = 100, MinTime = 3000, WaitTime = 25 };
 
     BlockingQueuedDestroyRaceObject sender;
@@ -385,6 +388,7 @@ void tst_QObjectRace::blockingQueuedDestroyRace()
 
         receiver->~BlockingQueuedDestroyRaceObject();
     }
+#endif
 }
 
 static QAtomicInteger<unsigned> countedStructObjectsCount;