Standardise products section of config according to docs.

Many configs had used product rather than products.  Since this is not yet used,
it was not detected.

custom_components/tuya_local/devices/electriq_airflex15w_heatpump.yaml

@@ -1,5 +1,5 @@
 name: ElectriQ Airflex 15W Heatpump
-product:
+products:
   - id: 4RUISW6Lmtz2u1l8
 primary_entity:
   entity: climate

custom_components/tuya_local/devices/es01_powerstrip.yaml

@@ -1,5 +1,5 @@
 name: Smart Plug with USB ES-01
-product:
+products:
   - id: hsoiigeykxh9m4hx
 primary_entity:
     entity: switch

custom_components/tuya_local/devices/hyundai_sahara_dehumidifier.yaml

@@ -1,5 +1,5 @@
 name: Sahara Dehumidifier
-product:
+products:
   - id: r6gik8xajfg0lv1y
     name: Dehumidifier-D030
 primary_entity:

custom_components/tuya_local/devices/kogan_kashmfp20ba_heater.yaml

@@ -1,5 +1,5 @@
 name: Kogan SmarterHome™ 2000W Flame heater
-product:
+products:
   - id: eqyne046pnqkysqh
 primary_entity:
   entity: climate

custom_components/tuya_local/devices/kogan_kawfpac09ya_airconditioner.yaml

@@ -1,5 +1,5 @@
 name: Kogan SmarterHome Portable Air Conditioner
-product:
+products:
   - id: mhod7aykax0wbivn
 primary_entity:
   entity: climate

custom_components/tuya_local/devices/moes_temp_humidity.yaml

@@ -1,5 +1,5 @@
 name: Moes Thermostat and Hydrostat
-product:
+products:
   - id: dlsdk5zvkuuhufpy
 primary_entity:
   entity: switch

custom_components/tuya_local/devices/parkside_plgs2012a1_smart_charger.yaml

@@ -1,5 +1,5 @@
 name: Parkside PLGS2012A1 Charger
-product:
+products:
   - id: h6pglenun37dzsgo
 primary_entity:
   entity: switch

custom_components/tuya_local/devices/pc321ty_energy_meter.yaml

@@ -1,5 +1,5 @@
 name: PC321-TY Power Clamp
-product:
+products:
   - id: r64livttuufctble
 primary_entity:
   entity: sensor

custom_components/tuya_local/devices/rgbcw_lightbulb.yaml

@@ -1,5 +1,5 @@
 name: RGBCW Lightbulb
-product:
+products:
   - id: aok3caeleulg1neh
     name: Lijun Smart Bulb RGBCW
 primary_entity:

custom_components/tuya_local/devices/smartplug_encoded.yaml

@@ -1,5 +1,5 @@
 name: Smartplug with encoded info
-product:
+products:
   - id: A6bBfm2fmKKRfIxU
     name: スマートプラグ
 primary_entity:

custom_components/tuya_local/devices/weau_pool_heatpump_v2.yaml

@@ -1,5 +1,5 @@
 name: W'Eau Pool Heatpump
-product:
+products:
   - id: zqwet1zcvj2wcxzw
 primary_entity:
   entity: climate