[compile hints] Add a runtime enabled feature for per-function compile hints

The feature is already implemented in V8, and Blink just needs to pass
the correct CompileOption when the runtime enabled feature is on.

Bug: 395575380
Change-Id: I5553eee6fe720e5d7f379ad3724dc9366354983e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6458880
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Kouhei Ueno <kouhei@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1449951}