Failing to do so results in an error when generating the respective
ValueType, since the index has to be encoded in 24 bits.

Bug: v8:7748, chromium:1080444
Change-Id: Ifd1ce9744388b65f91dbd9eaeb497726c6cd207e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2214823
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67952}