Trigger support for subtask conversion in Jira Automation

Issue Summary

Changing the issue type triggers the issue update event, however this is not the case for converting a task to a sub-task or vice versa. Does not trigger the event when moving to a different level.

The reason being is changing to a sub-task from a Jira expected is not considered an issue update and goes through a different flow. We should look to either introduce new trigger types, or provide an additional option to allow this to trigger on an existing trigger.

Change the issue type triggers the update event, however changing it to Subtasks does not trigger it. 

Steps to Reproduce

1. Create an automation rule with an update issue event as a trigger.
2. Change the issue type to subtasks.

Expected Results

It should trigger the rule.

Actual Results

It is not triggering the rule.
The problem might be related to the lack of a rest API endpoint to convert the issue type to subtasks.

Workaround

No workaround.