This changes OrderedHashMap, OrderedHashSet, and OrderedNameDictionary
as follows:
- Create a dedicated allocation function AllocateEmpty to create zero-
  element instances of these classes
- Fix bugs resulting from using these zero-element versions

Further, this CL
- provides a canonical empty versions of OrderedNameDictionary
- changes the types of the canonical ordered hash table and hash set
  from FixedArray to the actual subclasses

Bug: v8:7569
Change-Id: I0fe1215e7d164617afa777c8b3208a0857ab6edd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2476315
Commit-Queue: Frank Emrich <emrich@google.com>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70604}