Make chain of reiterable objects reiterable

Desired behavior:
```pycon
>>> xs = [1] :: [2]
>>> list(xs)
[1, 2]
>>> list(xs)
[1, 2]
>>> xs = (_ for _ in range(2)) :: (_ for _ in range(2))
>>> list(xs)
[0, 1, 0, 1]
>>> list(xs)
[]
```