This includes conversion of python scripts to python3.

Change-Id: I5c05b3ab2aa00711a0dc26f1885a73f0ef4dbd85
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3530115Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Andrey Kosyakov <caseq@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80702}