Write a function `add_lists` that takes two arguments:
1. `test_list`: A list of elements.
2. `test_tup`: A tuple of elements.
The function should return a new tuple that contains all the elements of `test_tup` followed by all the elements of `test_list`.
#### Example Usage
```python [main.nopy]
add_lists([5, 6, 7], (9, 10))
# Expected output: (9, 10, 5, 6, 7)
add_lists([6, 7, 8], (10, 11))
# Expected output: (10, 11, 6, 7, 8)
add_lists([7, 8, 9], (11, 12))
# Expected output: (11, 12, 7, 8, 9)
```