This CL is part of a series that adds the C++ implementation of
SwissNameDictionary, a deterministic property backing store based on
Swiss Tables.

This CL adds printing and verification functions.

Bug: v8:11388
Change-Id: I6af8672f19589f5693ebafbcafb8d59b26749eef
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2704669
Commit-Queue: Frank Emrich <emrich@google.com>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72954}