This is the reland of https://chromium-review.googlesource.com/c/v8/v8/+/1495898

builtin_function_id corresponded to BuiltinFunctionId (a manually maintained list of 'interesting' functionsmainly used during optimization). With this change, we nuke builtin-function-id in favor of builtin-id and 8 bits is freed up in SFI.

Bug: v8:6993
Change-Id: I7e1681cc2a95864c71ce8bdda075481310607166
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1506445Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Z Nguyen-Huu <duongn@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#60131}