input: Write a python function to iterate through each element in a list and return the list itself.
  assert iterate_list([1, 2, 3, 4, 5]) == [1, 2, 3, 4, 5]
  assert iterate_list([10, 20, 30, 40, 50]) == [10, 20, 30, 40, 50]
  assert iterate_list([5, 15, 25]) == [5, 15, 25]
output: def iterate_list(lst):
      for element in lst:
          pass
      return lst