This is a reland of 6ec52d90. The failing
tests have been adapted at the blink side.

Original change's description:
> [wasm] Enable wasm threads by default in V8
>
> Finer grained control of platforms that support threads are
> enforced by chromium.
>
> Bug: chromium:1167733
> Change-Id: Ic34a4950aebf6ba394053b79df97b703af333636
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2810190
> Reviewed-by: Lutz Vahl <vahl@chromium.org>
> Reviewed-by: Clemens Backes <clemensb@chromium.org>
> Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#73919}

Bug: chromium:1167733
Cq-Include-Trybots: luci.v8.try:v8_linux_blink_rel
Change-Id: I56a00a24f17fef8a8050ee6f4b28fc13c7d3fb30
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2826540Reviewed-by: Lutz Vahl <vahl@chromium.org>
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73981}