This CL implements setting the javascript_execution_assert
on the isolate from generated code, so we don't need to create
an expensive class in the embedder callback.

Bug: chromium:1218898
Change-Id: Ia05b49281ab4c1cc3ac34caf2dfadb79feb86e84
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2982998
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75414}