Hopefully making it easier to determine the problem when a
dynamically-sized object type allows too small sizes.

Change-Id: Iac33c501da6349e02f570fe8c9092758cd9d59a6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2874654
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74440}