input: Write a python function to convert a list of tuples into a dictionary, where the first element of each tuple is the key and the second element is the value.
  assert convert_tuples_to_dict([('a', 1), ('b', 2), ('c', 3)]) == {'a': 1, 'b': 2, 'c': 3}
  assert convert_tuples_to_dict([('x', 10), ('y', 20), ('z', 30)]) == {'x': 10, 'y': 20, 'z': 30}
  assert convert_tuples_to_dict([]) == {}
output: def convert_tuples_to_dict(tuples_list):
      return dict(tuples_list)