Replace by explicitly deleting the copy constructor and copy assignment
operator.

R=zhin@chromium.org

Bug: v8:11074
Change-Id: I30f4ff5ace47622cfb9891ee6a4d4f815ceb0ba3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2523314Reviewed-by: Zhi An Ng <zhin@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71115}