Moes TRV: make holiday switch optional

Issue #1891

custom_components/tuya_local/devices/moes_trv_thermostat.yaml

@@ -102,6 +102,7 @@ secondary_entities:
       - id: 1
         type: string
         name: switch
+        optional: true
         mapping:
           - dps_val: holidays
             value: true