Breaking: #79777 - EXT:scheduler - Deleted column for tasks added

Description

Instead of deleting the record directly in the database, a "deleted" column was added for tx_scheduler_task in a way to have developers / admins revive a task later-on.

Impact

It is not possible to remove a task completely using the delete button in the scheduler module.

Instead the "deleted" column will be set to 1 and the task won't show up in the backend module, and cannot be called via CLI anymore.

Affected Installations

If an extension is accessing the database table tx_scheduler_task directly, an additional deleted=0 check needs to be added.