Etop CH7100: turn off Auto thermostat when mode is not auto.

The auto thermostat had the logic for when mode is Auto, but was missing the
logic to turn off in other modes, leading to log messages like "unrecognized
HVAC mode of cold ignored".

custom_components/tuya_local/devices/etop_ch7100_thermostat.yaml

@@ -258,6 +258,7 @@ secondary_entities:
                 value: "off"
               - dps_val: true
                 value: heat_cool
+          - value: "off"
       - id: 104
         name: target_temp_high
         type: integer