Following up on https://crrev.com/c/3540145, this also changes local
debug evaluate scripts to be marked as shared-cross-origin.

Drive-by-fix: This also updates the test for global debug evaluate to
use the official (debug) API instead of peaking into the V8 internals
unnecessarily.

Bug: chromium:1295750
Change-Id: Ief0bc76a4333671f8db761d1f6a5fb740aae698e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3541780Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79568}