QmlDesigner: Update 3D tooltip for Component 3D component

Since this was in another repository, had to put it separately
as update. This would let the Component 3D to have tooltip in the
3D components space.

Fixes: QDS-9757
Change-Id: I91bbfbcd54776774989a12d4bbefe8c8deb93ab1
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>
Reviewed-by: Mahmoud Badri <mahmoud.badri@qt.io>
Reviewed-by: Mats Honkamaa <mats.honkamaa@qt.io>

src/plugins/qmldesigner/qtquickplugin/quick.metainfo

@@ -571,6 +571,7 @@ MetaInfo {
             requiredImport: "QtQuick3D"
 
             QmlSource { source: ":/qtquickplugin/source/component3d.qml" }
+            toolTip: qsTr("Allows you to define 3D components inline, within a QML document.")
         }
     }