🚚 Move backend tests outside the app directory (#1862)

Co-authored-by: Alejandra <90076947+alejsdev@users.noreply.github.com>

backend/tests/utils/item.py

@@ -0,0 +1,16 @@
+from sqlmodel import Session
+
+from app import crud
+from app.models import Item, ItemCreate
+from tests.utils.user import create_random_user
+from tests.utils.utils import random_lower_string
+
+
+def create_random_item(db: Session) -> Item:
+    user = create_random_user(db)
+    owner_id = user.id
+    assert owner_id is not None
+    title = random_lower_string()
+    description = random_lower_string()
+    item_in = ItemCreate(title=title, description=description)
+    return crud.create_item(session=db, item_in=item_in, owner_id=owner_id)