Reject unsupported RXPS before changing suspended scan policy

Keep rejected power-saving requests from changing radio2's saved RX policy or timings. Exercise actual CLI, scan restoration and calibration sleep guards with semantic negative controls.

.github/workflows/run-unit-tests.yml

@@ -471,6 +471,7 @@ jobs:
           python3 -B test/test_radio_profile_spiffs_missing.py -v
           python3 -B test/test_radio_reply_mutation.py
           python3 -B test/test_radio_profile_scan.py
+          python3 -B test/test_radio_rxps_rejection.py -v
           python3 -B test/test_repeater_radio_timing_integration.py
           python3 -B test/test_temp_radio_reply_delivery_contract.py
           python3 -B test/test_reply_tx_integration.py