Use common state for "Off" in climate selector (#141850)

* Use common states for "Away" and "Off" in `climate`

* Revert common state for "Away"

Four other integrations are referencing this instead of the common state. Needs to be addressed first.

homeassistant/components/climate/strings.json

@@ -257,7 +257,7 @@
   "selector": {
     "hvac_mode": {
       "options": {
-        "off": "Off",
+        "off": "[%key:common::state::off%]",
         "auto": "Auto",
         "cool": "Cool",
         "dry": "Dry",