pluginOptions' => ['exclude' => [ 'upload'] ] doesn't desactivate copy/paste images in the editor

[Gilbertdelyon]

See this thread https://github.com/humhub/humhub/issues/6995

In a custom module I would like users not adding images in a Richtextfield I can remove the 'upload' button from the menu, but you can still add images by way of a simple copy/paste. Please, could you add an option so that adding image or file is not possible by any way?