A GC can happen while we allocate the resume callback, and before the
suspender is fully initialized. We cannot just change the order of
allocation, because they both reference each other. So temporarily set a
default value for the "resume" property to make the GC happy.

R=jkummerow@chromium.org

Bug: v8:12803
Change-Id: Ieecc5182b8dcf7a159713c9400d65da59c4b2af6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3586989Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80027}