This brings the graph builder in sync with the serializer (and
exponentiation in sync with the other binary operators).

Bug: chromium:995430, v8:7790
Change-Id: I809b6f3756f75392cdc6747f8bcee8cdf0ee0f74
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1762013
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63269}