A minor refactoring to the logic for triggering callbacks:
1. If compilation failed, do only trigger the kFailedCompilation event.
2. Use the TriggerCallbacks method also for triggering the
  kFailedCompilation event.

R=thibaudm@chromium.org

Bug: chromium:1101340
Change-Id: I3446d708d28068448e6eca3e637c9af673f5311d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2332171Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69215}