[lldb] Fix TestStatisticsAPI after 9293fc7 (#94683)

Author: bulbazord

lldb/test/API/functionalities/stats_api/TestStatisticsAPI.py

@@ -85,14 +85,15 @@ def test_stats_api(self):
         stats_summary.GetAsJSON(stream_summary)
         debug_stats_summary = json.loads(stream_summary.GetData())
         self.assertNotIn("modules", debug_stats_summary)
-        self.assertNotIn("memory", debug_stats_summary)
         self.assertNotIn("commands", debug_stats_summary)
 
         # Summary values should be the same as in full statistics.
-        # Except the parse time on Mac OS X is not deterministic.
+        # The exceptions to this are:
+        # - The parse time on Mac OS X is not deterministic.
+        # - Memory usage may grow over time due to the use of ConstString.
         for key, value in debug_stats_summary.items():
             self.assertIn(key, debug_stats)
-            if key != "targets" and not key.endswith("Time"):
+            if key != "memory" and key != "targets" and not key.endswith("Time"):
                 self.assertEqual(debug_stats[key], value)
 
     def test_command_stats_api(self):