Now that all individual methods are being performed concurrently, we can
move DescriptorArray to skip serialization.

Bug: v8:7790
Change-Id: I4bda72e6302b0f2e224f9fa2e4e97877e42a3c2d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2720280
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73160}