Additionally to the baseline compilation time, do also measure the time
it takes to tier up to TurboFan.
Since the {AsyncCompileJob} will be gone after baseline compilation,
the timing has to be done via a separate callback, which will survive
until after top-tier compilation.

R=ahaas@chromium.org
CC=jwd@chromium.org

Bug: chromium:978425
Change-Id: I7914173191c8a7a2aeb47343973d4034010047a4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1678362
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62410}