Since e9734f4975 assignation is now a notification sent in the
inbox or by email to the newly-assigned responsible. It is therefore
considered as not necessary to link a subtype to the assignation itself.
Indeed having it logged in the discussion history as a classic tracking
in addition to the notification is considered as sufficient.
In project module the task opened subtype was linked to task creation and
task assignation. This subtype is now used only for task creation. It also
fixes a strange behavior. Changing assigned user in an ongoing task was
trigerring the task opened subtype which was strange. This is not the case
anymore.
This commit is related to task ID 60790. Closes#23244 .
Thibault Delavallée
b227f6e759