Function prepare_egui_render_target_data_system 

pub fn prepare_egui_render_target_data_system(
    render_data: ResMut<'_, EguiRenderData>,
    render_targets: Query<'_, '_, (Entity, &ExtractedView, &RenderComputedScaleFactor, &EguiViewTarget, &EguiRenderOutput)>,
    extracted_cameras: Query<'_, '_, &ExtractedCamera>,
    render_device: Res<'_, RenderDevice>,
    render_queue: Res<'_, RenderQueue>,
)

Prepares Egui transforms.