This will allow us to refactor those V8 files without being concerned
about potential interference with the security of the trap handler.

This requires the duplication of V8_EXPORT_PRIVATE, the CHECK/DCHECK
macros, and V8_DISABLE_ASAN. The trap-handler specific definitions
are prefixed with "TH_".

R=ahaas@chromium.org

Bug: v8:11755
Change-Id: Iac39b553704ef50e51937375c8db805d57ce2625
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2880218
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74588}