Instead of just DCHECKing that we are in a safepoint in
Snapshot::Create, pass the GlobalSafepointScope as argument.

Bug: v8:11708, v8:12377
Change-Id: Ia856c27b92223bf3a96fe6946b86e4625f3a1e0f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3295342Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78014}