TaskTree: Rename setupRoot into setRecipe

The passed Group root element is a recipe with
a full description on how to execute the tasks
and how to handle finished tasks.

We have already virtual methods / setters called like:
deployRecipe, refreshRecipe, reloadRecipe. So, the
common "recipe" is kind of consistent.

Fix typos in warnings.

Addresses the 11th point in the task below.

Task-number: QTCREATORBUG-28741
Change-Id: I1c80f4838b6a3e5ed113eaf8e42b59746d098efe
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>

src/plugins/qnx/qnxdeployqtlibrariesdialog.cpp

@@ -228,7 +228,7 @@ GroupItem QnxDeployQtLibrariesDialogPrivate::chmodTree()
             QTC_ASSERT(file.isValid(), continue);
             chmodList.append(chmodTask(file));
         }
-        tree.setupRoot(chmodList);
+        tree.setRecipe(chmodList);
     };
     return TaskTreeTask{setupChmodHandler};
 }