Correct license in test directory

According to QUIP-18 [1], all test files should be
LicenseRef-Qt-Commercial OR GPL-3.0-only and all
build system should be BSD-3-Clause.

[1]: https://contribute.qt-project.org/quips/18

Pick-to: 6.8
Task-number: QTBUG-121787
Change-Id: I9da6b82b6d620e72d5c6700e3d5901f9049f89e9
Reviewed-by: Santhosh Kumar <santhosh.kumar.selvaraj@qt.io>

tests/manual/quicklayouts/sizepolicies/CMakeLists.txt

@@ -1,5 +1,5 @@
 # Copyright (C) 2024 The Qt Company Ltd.
-# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+# SPDX-License-Identifier: BSD-3-Clause
 
 if (NOT QT_BUILD_STANDALONE_TESTS AND NOT QT_BUILDING_QT)
     cmake_minimum_required(VERSION 3.16)

tests/manual/quicklayouts/sizepolicies/main.cpp

@@ -1,5 +1,5 @@
 // Copyright (C) 2024 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
 #include <QGuiApplication>
 #include <QQmlApplicationEngine>

tests/manual/quicklayouts/sizepolicies/main.qml

@@ -1,5 +1,5 @@
 // Copyright (C) 2024 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
 import QtQuick
 import QtQuick.Controls