This CL contains a bunch of different improvements to the existing
object stats, namely:

 - Introduce DEPRECATED_DESCRIPTOR_ARRAY_TYPE virtual instance type to
   also estimate the memory overhead of DescriptorArrays for deprecated
   Maps.
 - Do proper over-allocation computating for inobject fields in JSObjects.
 - Introduce OBJECT_PROPERTY_ARRAY_TYPE virtual instance type and properly
   compute over-allocation for PropertyArrays
 - Compute over-allocation for JSObject/JSArray elements properly.
 - Correctly report JSFunction and JSCollection like the other
   JSObjects, specifically report over-allocation properly for the
   instances itself and for the elements/properties backing stores.
 - Implement correct over-allocation computation for hash tables in
   ObjectStatsCollectorImpl::RecordHashTableVirtualObjectStats().

Bug: v8:7266
Change-Id: I9cadd703266dc90911a8e7420c3b00dcee82b06d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1557139
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Auto-Submit: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60683}