The DCHECK was overly restrictive when checking that a weak handle is
not a finalizer when hitting it through a regular scavenge processing
path.

Only happened with finalizers to unmodified API wrappers or regular
objects that were also marked as independent.

Bug: v8:8586
Change-Id: I2c2a5b21f6e8a5ddc6671f762b508ba083c04335
Reviewed-on: https://chromium-review.googlesource.com/c/1387485Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58414}