Refactor-only, this moves interrupt scopes and stack guard code into
their own dedicated files.

Change-Id: I5723a04786a04bba31a0da54622f3cd0b926ef07
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1655288
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62141}