[Reg 3.9.0 -> 4.0.0] Command line arguments are no longer passed correctly to the QML Runtime

Qt DS 4.0 now wraps command line arguments in double quotes, which breaks the QML Runtime behaviour.

Steps to reproduce

1. Load the attached project
2. In the Run Settings, add "-S custom" (without quotes) as the "Command line arguments"
3. Click "Run" (Ctrl+R)

Expected outcomes (Qt DS 3.9.0)

The application window shows the text, "Custom Selected Screen"

The Application Output pane (Alt+3) shows:

(Qt 5 kit)

Starting C:\Qt\Tools\QtDesignStudio\qt5_design_studio_reduced_version\bin\qmlscene.exe -S custom C:/Test/QtDSSelector/content/App.qml...

(Qt 6 kit)

Starting C:\Qt\Tools\QtDesignStudio\qt6_design_studio_reduced_version\bin\qml.exe -S custom C:/Test/QtDSSelector/content/App.qml...

Actual outcomes (Qt DS 4.0.0), Qt 5 kit

The application window shows the text, "Default Screen"

The Application Output pane (Alt+3) shows:

Starting C:\Qt\Tools\QtDesignStudio\qt5_design_studio_reduced_version\bin\qmlscene.exe "-S custom" C:/Test/QtDSSelector/content/App.qml...

Actual outcomes (Qt DS 4.0.0), Qt 6 kit

The application window does not appear at all.

The Application Output pane (Alt+3) shows:

Starting C:\Qt\Tools\QtDesignStudio\qt6_design_studio_reduced_version\bin\qml2puppet-4.0.0.exe --qml-runtime "-S custom" C:/Test/QtDSSelector/content/App.qml...
...
Error: Unknown option 'S custom'.