JSCallReducer::ReduceCallApiFunction is now heap access free.

Bug: v8:7790
Change-Id: I5718d73589d0bed14149ef0bc084b8a6ab1b9b5b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1624792
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62014}