test262 tests use this to trigger a gc and test WeakRefs

Bug: v8:8179
Change-Id: I84ca88f0bf11734ea65d7f6c2a5e5e2d13dccb7d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1714871Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Mathias Bynens <mathias@chromium.org>
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62874}