Deopt tracing is both verbose and hard to read. This CL splits verbose
tracing into a new --trace-deopt-verbose flag (s.t. --trace-deopt now
emits single-line events only), refactors tracing methods to all be on
the Deoptimizer class, and clarifies output.

Bug: v8:8888
Change-Id: I3cf8e6878e5e996ca9a2e276ab8ba2d5b18d91a7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2413252
Auto-Submit: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69941}