[bootstrapper] copy accessors in deserialized global into global object created using global proxy template

Originally, the accessors wont be copied into global object from
deserialized global. And the accessors in serialized global object
will be lost. Fix to copy accessors in deserialized global
into global object when recreating new global object using passed
global proxy template.
Tests credited to xiangyangemail@gmail.com https://chromium-review.googlesource.com/c/v8/v8/+/3405405

Bug: v8:12564
Change-Id: Iefb3a6dbfa5445b227d87c26eb423cf1b924dbb4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3459937Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79087}