Fix Window/wrap_controls does not account for the content_scale_factor

[Delsin-Yu]

Previously

wrap_controls allows a window to self-determine its best minimum size for displaying its children Controls, however, such calculation forgot to include the content_scale_factor, which leads the window too big (if the scale factor is less than one) or too small (if the scale factor is larger than one) for its content_scale_factor applied children.

QQ2024515-52755.mp4

In this PR

I multiplied the results of the Window::_get_contents_minimum_size() with content_scale_factor, which results in the correct size.

QQ2024515-152828.mp4

Closes #91960

[akien-mga]

Please amend the commit message to be explicit. See https://github.com/godotengine/godot/blob/master/CONTRIBUTING.md#be-mindful-of-your-commits

[Delsin-Yu]

Please amend the commit message to be explicit. See https://github.com/godotengine/godot/blob/master/CONTRIBUTING.md#be-mindful-of-your-commits

Done.