... and introduce CodeRange::GetWritableReservedAreaSize() as a
bottleneck for calculating a size of the writable area used for unwind
information.

Bug: v8:11880
Change-Id: Ifa2a3f74ce994cffb6bb8bef12ab17b69dabd706
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3244409
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Auto-Submit: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#77555}