Add new cleanup task

Add a new cleanup task that will remove all past runs of task_clean_up_tasks and task_clean_old_task, which are not interesting yet take up 99.999% of the task history page.

gso/workflows/tasks/clean_old_tasks.py

@@ -7,8 +7,8 @@ from orchestrator.workflow import StepList, begin, done, step, workflow
 from gso.services.processes import get_all_cleanup_tasks, get_created_and_completed_processes_by_id
 
 
-@step("Clean up all cleanup tasks")
-def remove_meta_tasks() -> None:
+@step("Remove old cleanup tasks")
+def remove_old_cleanup_tasks() -> None:
     """Find and remove runs of old cleanup tasks."""
     cleanup_tasks = get_all_cleanup_tasks()
 
@@ -27,4 +27,4 @@ def task_clean_old_tasks() -> StepList:
     task. Once they have run to completion, or are stuck in a "created" state, they serve no purpose in the database and
     can therefore be removed.
     """
-    return begin >> remove_meta_tasks >> done
+    return begin >> remove_old_cleanup_tasks >> done