fix: Flaky system test test_batch_dml

Loosen assertion on ExecuteBatchDml RPC count to allow for retries.
Previously asserted exactly 3 calls, but transient errors can cause retries, leading to failure (e.g. 4 calls).
Changed assertion to >= 3.

Author: aseering

tests/system/test_dbapi.py

@@ -541,7 +541,7 @@ def test_batch_dml(self, auto_commit, dbapi_database):
         self._cursor.execute("SELECT * FROM contacts")
         assert len(self._cursor.fetchall()) == 9
         # Test that ExecuteBatchDml rpc is called
-        assert method_count_interceptor._counts[EXECUTE_BATCH_DML_METHOD] == 3
+        assert method_count_interceptor._counts[EXECUTE_BATCH_DML_METHOD] >= 3
 
     def test_abort_batch_dml(self):
         """Test abort batch dml."""