[4.2.x] Fixed #34372 -- Fixed queryset crash on order by aggregation using OrderBy.

Regression in 278881e376 caused by a lack
of expression copying when an OrderBy expression is explicitly provided.

Thanks Jannis Vajen for the report and regression test.
Backport of b15f162f25 from main

tests/ordering/tests.py

@@ -638,3 +638,9 @@ class OrderingTests(TestCase):
             .first(),
             self.a1,
         )
+
+    def test_order_by_expr_query_reuse(self):
+        qs = Author.objects.annotate(num=Count("article")).order_by(
+            F("num").desc(), "pk"
+        )
+        self.assertCountEqual(qs, qs.iterator())