Revert "Templates: replace validvalues with choice (BC) (#17653)"

This reverts commit 02cc6899a7.

util/templates/defaults.yaml

@@ -222,8 +222,7 @@ params:
       de: "'de' für Deutsch und 'en' für Englisch"
       en: "'en' for English and 'de' for German"
     default: en
-    type: choice
-    choice: ["en", "de"]
+    validvalues: ["de", "en"]
   - name: icon
     description:
       de: Icon
@@ -232,7 +231,7 @@ params:
       de: "Icon in der Benutzeroberfläche"
       en: "Icon as shown in user interface"
     type: choice
-    choice:
+    validvalues:
       - car
       - bike
       - bus

util/templates/types.go

@@ -187,6 +187,7 @@ type Param struct {
 	Values        []string     `json:",omitempty"` // user provided list of values e.g. for Type "list"
 	Usages        []string     `json:",omitempty"` // restrict param to these usage types, e.g. "battery" for home battery capacity
 	Type          ParamType    // string representation of the value type, "string" is default
+	ValidValues   []string     `json:",omitempty"` // list of valid values the user can provide
 	Choice        []string     `json:",omitempty"` // defines a set of choices, e.g. "grid", "pv", "battery", "charge" for "usage"
 	AllInOne      *bool        `json:"-"`          // defines if the defined usages can all be present in a single device