Verify usages of SKIP_WRITE_BARRIER in builds with SLOW_DCHECKs enabled.
We can only remove the write barrier in specific circumstances that
can also be DCHECK'ed.

I also switched some write barriers to UPDATE_WRITE_BARRIER where those
simple rules didn't hold but relied on more elaborate explanations.

Bug: v8:12544
Change-Id: I4caa43627f8a3209d853e3352caabc161568e6eb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3386803Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78649}