"Iterate" takes an iterable and a function of TNode<Object>, and
implements the iterator protocol to iterate the iterable, applying the
function to each element.

It handles exceptions thrown during iteration and closes the iterator as
appropriate -- the hope is that if the body of the iteration has no
exception-throwing nodes, TurboFan can dead-code eliminate this close.

In the future, we may want to add an array fast-path to this method;
centralising the implementation means that this fast-path will then be
used by all callers of Iterate.

Change-Id: I9fe2f862b78619fe21ea7cb6469ed7ba93f14a30
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3581770Reviewed-by: Frank Tang <ftang@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80075}