Fix monolith build complaning about used implicit copy ctor when copy
operator is explicitly defined.

Bug: v8:12402
Change-Id: Iec30882af1c825c277a2e538400c85348daa6301
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3289624
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Auto-Submit: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#77951}