Instead of generating huge switch statements for builtin accessor functions,
simply store isolate-independent metadata in a struct indexed by builtin-id.

Drive-by-fix: Remove duplicate parameter-count lookup accessor.
Drive-by-fix: Print builtin kind with --print-builtin-size.

Bug: v8:6624
Change-Id: Ibe61eeee6b8849d5e1a2361ec8268b233be8bb13
Reviewed-on: https://chromium-review.googlesource.com/591847
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46994}