Introduce a single point to emit CodeCreateEvents for all builtins in
Isolate::Init. At this location, we cover both the case of builtin generation
(e.g. in mksnapshot) and deserialized builtins (in standard builds),
whereas previously we only emitted events post-builtin-generation.

In order to preserve behavior for bytecode handler events, pack the bytecode
and operand scale into our existing builtin metadata table.

Drive-by: Update way-out-of-date comment in the static initializer
check.

Bug: v8:8674
Change-Id: Iced8f73568e920846cde6f7b0a9c1e61844258ad
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1627337
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Dan Elphick <delphick@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61782}