For low-cost exception handling, it's important to be able to quickly
drop frames from the stack until reaching the exception handler.
The Intel shadow stack offers an instruction to avoid offending
stack discipline, incsspq, which drops N values from the stack.

This CL integrates that instruction for v8 exception handling.

Bug: v8:11246
Change-Id: I908f0ab8bb3de6c36e6078e27b65132287328f2d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3289637Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78469}