feat: Adapt to the new interface of dde-control-center

hasBackground -> backgroundType

Log:

Author: mhduiy

panels/dock/dcc-dock-plugin/qml/PluginArea.qml

@@ -45,7 +45,7 @@ DccObject {
                 property real iconSize: 16
                 parentName: "personalization/taskBar/pluginArea/pluginAreaView"
                 weight: 10 + index * 10
-                hasBackground: true
+                backgroundType: DccObject.Normal
                 icon: model.icon
                 displayName: model.displayName
                 pageType: DccObject.Editor