Shinco 30D: make water pump optional

For better matching of Klarstein DryFy Connect 30
Issue #2448

custom_components/tuya_local/devices/shinco_30d_dehumidifier.yaml

@@ -190,4 +190,5 @@ secondary_entities:
     dps:
       - id: 102
         type: boolean
+        optional: true
         name: switch