Switch from an array of supported types to a switch over
type kinds, in preparation for user-defined reference types.

Bug: v8:7748
Change-Id: I17a0a71184ee0937748f07f22c1fd545a057fb6e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2584950
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Auto-Submit: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71733}