[test] Add unit tests for ACP and ALRU cleaning policy parameters

- Add tests for wake-up and flush-max-buffers parameter validation
- Test parameter boundary values and error conditions
- Cover parameter parsing from configuration strings
- Verify set_param_cleaning_policy commands construction
- Test proper handling of different cleaning policies in configure_cache

These tests ensure the proper validation and handling of cleaning policy
parameters introduced in the previous commits.

test/utils_tests/opencas-py-tests/test_cas_config_01.py

@@ -568,6 +568,16 @@ def test_set_param_cleaning_policy(mock_run_cmd):
         '--flush-max-buffers', '200'
     ])
 
+    # Nop policy
+    mock_run_cmd.reset_mock()
+    opencas.casadm.set_param("cleaning", cache_id=3, policy="nop")
+    mock_run_cmd.assert_called_with([
+        '/sbin/casadm', 
+        '--set-param', '--name', 'cleaning', 
+        '--cache-id', '3', 
+        '--policy', 'nop'
+    ])
+
 
 @patch("opencas.casadm.set_param_cleaning_policy")
 @patch("opencas.casadm.set_param")