Use C++17's std::void_t instead.

R=leszeks@chromium.org

Bug: v8:12425
Change-Id: I1367af170505ed97a725e22f6b60cce056f72cb1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3568476Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79783}