If we do the check in InvokeFunctionCode instead of doing it in
CheckDebugHook (now aptly named 'DebugHook'), we can defer the
debug hook to the end of InvokeFunctionCode and is to make the
common case stay in straight-line code.

Bug: v8:9771
Change-Id: Icff84e8ced9d120ae2fe293a391aaadd53441644
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1829219
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Dan Elphick <delphick@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64183}