This is a reland of 85e6c4b6
GC-stress issue was flushing, fixed with https://crrev.com/c/3048172.
Relanding without changes.

TBR=verwaest@chromium.org

Original change's description:
> [sparkplug] Enable sparkplug by default on desktop
>
> Bug: v8:11420
> Change-Id: I07ac7f30b5ffffe40170ac15d5df0d3bf8a53523
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3041418
> Auto-Submit: Leszek Swirski <leszeks@chromium.org>
> Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#75868}

Bug: v8:11420
Change-Id: I44ac0e4a5df07db79fa50db3134cdae3af41c88c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3053588
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75916}