We need this because read_heap_type uses the type vector capacity as
out-of-bounds limit.

Bug: chromium:1314496, v8:7748
Change-Id: Id76c8a143c32b20b24356f361d554cb212576c09
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3578654Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79882}