Apply to dconf generation new metaEnabled/Disabled filter

We are now ensuring that dconf is generating a different
enabled/disabled entry for its entries:
- enabled has default "empty" + "meta" entries
- disabled doesn’t need the empty entry, it will use system default
  which isn’t empty. Only file in "meta" then.

Co-authored-by: Jean-Baptiste Lallement <jean-baptiste@ubuntu.com>

internal/policies/ad/admxgen/common/common.go

@@ -38,10 +38,10 @@ type ExpandedPolicy struct {
 	DisplayName  string
 	ExplainText  string
 	ElementType  WidgetType
-	Meta         map[string]string
-	MetaEnabled  map[string]string
-	MetaDisabled map[string]string
-	Class        string `yaml:",omitempty"`
+	Meta         map[string]string `yaml:",omitempty"`
+	MetaEnabled  map[string]string `yaml:",omitempty"`
+	MetaDisabled map[string]string `yaml:",omitempty"`
+	Class        string            `yaml:",omitempty"`
 	Default      string
 	Note         string `yaml:",omitempty"`
 

internal/policies/ad/admxgen/dconf/dconf.go

@@ -145,10 +145,13 @@ func inflateToExpandedPolicies(policies []Policy, release, currentSessions strin
 		if len(s.Choices) > 0 {
 			ep.ElementType = common.WidgetTypeDropdownList
 		}
-		ep.Meta = map[string]string{
+		ep.MetaEnabled = map[string]string{
 			"meta":  s.Type,
 			"empty": m.emptyValue,
 		}
+		ep.MetaDisabled = map[string]string{
+			"meta": s.Type,
+		}
 
 		if m.widgetType == common.WidgetTypeLongDecimal {
 			min := ep.RangeValues.Min