Replace the "PublishCompilationResults" event by "AddCompiledCode" and
"PublishCode". The former will be parallel, while the latter will not
be. This was a bit misleading before, since in the
"PublishCompilationResults" event we didn't always publish.

R=ahaas@chromium.org

Change-Id: Ia114d6edda77ebf128416af9be998d54bc8aaa12
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2479470
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70616}