feat(fairland_ipchr15_heatpump): add IPCHR20 model

Issue #5735

custom_components/tuya_local/devices/fairland_iphcr15_heatpump.yaml

@@ -6,6 +6,9 @@ products:
     # - id: UNKNOWN
     #   manufacturer: Fairland
     #   model InverterPlus
+  - id: CGJ08iaKlWqKmVuX
+    manufacturer: Fairland
+    model: IPHCR20
 entities:
   - entity: climate
     translation_only_key: pool_heatpump