.. and just the option for now, there's no logic behind this yet.

--maglev-function-context-specialization enables FCS globally, and the
MaglevCompilationInfo stores for each compilation job whether FCS is
enabled.

Bug: v8:7700
Change-Id: I4c32fe93fca70ae3644588902e282910a9673b74
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3905382Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Jakob Linke <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/main@{#83351}