This is a reland of 9287befe

- Add missing commas for api group
- Add trailing commas for existing lists

Original change's description:
> [watchlist] Add cbruni@ to api watchlist
>
> - Remove unused ia32 watchlist group
> - Add api watchlist group
>
> Change-Id: Ia64d2368de54a846ce548a66eef7e96ee5579a3a
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3084365
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Commit-Queue: Camillo Bruni <cbruni@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#76189}

Change-Id: Idb2a09e1b55bb3ad9aed0d8f0c37f48dfef28ec0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3085263Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#76200}