Execute the "convert-to-rhel-conversion" task in the Tasks application by making a POST request to the "/executed_task" endpoint with the task identifier set to "convert-to-rhel-conversion." Validate the successful execution of the task by checking the response status and confirming the accurate recording of the executed task in the system.

Acceptance Criteria:

1. Implement a test scenario where the "convert-to-rhel-conversion" task is executed using a POST request to the "/executed_task" endpoint.
2. Verify that the request body includes the necessary information, specifically the task identifier set to "convert-to-rhel-conversion."
3. Confirm the successful execution of the task by checking the response status and relevant details.
4. (Optional) Add negative tests when trying to execute the task