This adds two flags to dump "type feedback" (call targets and
frequencies) to a local file, or load it from there. This is meant for
experimentation only.

Some implications are removed, as (speculative) inlining now does not
require Liftoff any more, but can also use information from PGO.

R=jkummerow@chromium.org

Bug: v8:13209
Change-Id: I2d34233ce4077db61f5c237b1941136ac61d3b73
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3870470Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82979}