"Wait until date* workflow won't purge Varnish cache after execution of the cronjob

Steps to reproduce

• Make sure varnish is running and configured/clearing caches correctly
• Create a "Varnish" Folder, and an Article inside it, access and verify the folder in frontend using varnish.
• Configure a "wait until date" workflow for "Article class", trigger, etc.
• Create a new Article in the "Varnish" folder, with publish date 1 minute in the future, wait 1 minute.
• Optional: run "varnishlog" command on the varnish server and monitor the output
• run the cronjob, and verify the workflow is done.

  php -d memory_limit=-1 ezpublish/console --env=prod ezpublish:legacy:script runcronjobs.php frequent

• Optional: verify the varnishlog command is empty (no BAN)
• Access the "Varnish" folder in frontend, using varnish, and verify it wasn't updated.
• Access the "Varnish" folder in frontend, without varnish, and verify it was updated.

^{EZP-23250 seems to be related, but the steps described there won't work here.}