Initialization after reset + unnecessary use of handle scope appear to
be the culprit here. Most of the other functions in debug::Script do not
use HandleScope, so this reconciles these differences. Additionally,
the call to obtain and initialize the hash within
ActualScript::Initialize was inconsistent: all of the other fields were
initialized prior to resetting the script and source.

These reconciliations appear to fix this crash.

Bug: chromium:1325036
Change-Id: Ia86e83b6c99955a3ac80a4a8845c0df0172e991c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3648082
Commit-Queue: Robert Paveza <Rob.Paveza@microsoft.com>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Auto-Submit: Robert Paveza <Rob.Paveza@microsoft.com>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80760}