This CL adds support for integer and double values in web snapshots.

Bug: v8:11525, v8:11706
Change-Id: Ib75c52d440cd51bf78f57eecca09cecf35b801a4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2854734
Commit-Queue: Vicky Kontoura <vkont@google.com>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74259}