We have several ways of doing the Isolate or LocalIsolate calls. Let's
unify it to have one consistent way of doing it.

Bug: v8:7790
Change-Id: I7d860e918406b07e3b8ab2d46e775a2beb5a4397
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2718609Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73048}