javax.servlet package warnings when starting products from the IDE

A warning like this is always shown when starting Simantics-based products from the IDE since #877 (closed):

It has something to do with all the Jetty versions included in products thanks to Vaadin 8 based Simupedia and the Eclipse 2022-03 bundled Jetty 10.

This is only a problem when starting products from the IDE, not when starting Tycho-built products.

I have not yet been able to figure out how to avoid this.