Add policies to generated CMake to avoid warnings

This configuration warning occurs when a project exported to Creator is configured

[cmake] CMake Warning (dev) at C:/Qt/6.8.1/msvc2022_64/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:3353 (message):
[cmake]   Qt policy QTP0001 is not set: ':/qt/qml/' is the default resource prefix
_[cmake]   for QML modules.  Check https://doc.qt.io/qt-6/qt-cmake-policy-qtp0001.html_
[cmake]   for policy details.  Use the qt_policy command to set the policy and
[cmake]   suppress this warning.
[cmake] 
[cmake] Call Stack (most recent call first):
[cmake]   C:/Qt/6.8.1/msvc2022_64/lib/cmake/Qt6Qml/Qt6QmlMacros.cmake:708 (qt_internal_setup_policy)
[cmake]   Dependencies/Components/src/imports/utils/CMakeLists.txt:6 (qt6_add_qml_module)
[cmake] This warning is for project developers.  Use -Wno-dev to suppress it.

QTP0001 could be set in the generated CMake to avoid this since it is confusing to users and creates unnecessary noise in the log