refactor: Use move semantics in CCheckQueue::Add

Co-authored-by: Martin Leitner-Ankerl <martin.ankerl@gmail.com>

src/test/checkqueue_tests.cpp

@@ -140,6 +140,17 @@ struct FrozenCleanupCheck {
             cv.wait(l, []{ return nFrozen.load(std::memory_order_relaxed) == 0;});
         }
     }
+    FrozenCleanupCheck(FrozenCleanupCheck&& other) noexcept
+    {
+        should_freeze = other.should_freeze;
+        other.should_freeze = false;
+    }
+    FrozenCleanupCheck& operator=(FrozenCleanupCheck&& other) noexcept
+    {
+        should_freeze = other.should_freeze;
+        other.should_freeze = false;
+        return *this;
+    }
     void swap(FrozenCleanupCheck& x) noexcept
     {
         std::swap(should_freeze, x.should_freeze);