We can make sure we exhaustively test all CreateArgumentsTypes by using
a switch rather than if-else.

Change-Id: Id00094eeb4cb0af212f5c939314aec72a30a3ee0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2128054Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66919}