Make the GetDispatchCountersObject function return an internal Handle
rather than an API Local. Also, port its implementation to use internal
methods rather than API methods.

Change-Id: I191e0483263009c835c801462822e4fc7e78680e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3110198
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Dan Elphick <delphick@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76485}