This is a reland of 0f79565b
which is a reland of 85e6c4b6
GC-stress issue was still flushing, now fixed for real with
https://crrev.com/c/3054117.

Relanding without changes.

TBR=verwaest@chromium.org

Original change's description:
> Reland "[sparkplug] Enable sparkplug by default on desktop"
>
> 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}

Bug: v8:11420
Change-Id: I24c7aea81ca58c339fc3bcc904663bdefb93106b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3054118Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#75926}