fix: deleting all participant along all teams (#815)

### Description

When deleting all teams, participants must be deleted as well

### Checklist

- [ ] Created tests which fail without the change (if possible)
- [ ] All tests passing
- [ ] Extended the documentation, if necessary

Author: maximeroucher

app/modules/raid/cruds_raid.py

@@ -192,6 +192,13 @@ async def delete_participant(
     await db.flush()
 
 
+async def delete_all_participant(
+    db: AsyncSession,
+) -> None:
+    await db.execute(delete(models_raid.Participant))
+    await db.flush()
+
+
 async def delete_team_invite_tokens(
     team_id: str,
     db: AsyncSession,

app/modules/raid/endpoints_raid.py

@@ -464,6 +464,9 @@ async def delete_all_teams(
     # Delete all teams from the database
     await cruds_raid.delete_all_teams(db)
 
+    # Delete all participants from the database
+    await cruds_raid.delete_all_participant(db)
+
     delete_all_folder_from_data("raid")