Annotating the global handles gives us a nice description in heap
snapshots.

Bug: v8:12198
Change-Id: Ie6385794a6b5a1d43f5730b6ff521611f1b366af
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3304067Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78134}