Creating the LogCodesTask and adding the code objects to it adds 10-20%
to Liftoff compilation time. Thus cache whether code logging is needed
per isolate, and avoid the overhead if that flag is false.

R=mstarzinger@chromium.org

Bug: v8:8783, chromium:928722
Change-Id: I059266da3309a4b1ed316016d0a55fa34f139057
Reviewed-on: https://chromium-review.googlesource.com/c/1454484
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59400}