We can walk linear prototype chains using iteration instead of
recursion, reducing the likelihood (though not excluding the
possibility) that large prototype-relation graphs will run into
a stack overflow.
This partial mitigation should be performance neutral.

Bug: v8:10522
Change-Id: Ia266efe38a9cc52fe6ab2189066f45c4566f3596
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2245591Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68530}