Compiling without -fno-exceptions causes compilation errors, this
CL fixes that.

The reason for the compilation error is a mismatch of "V8_NOEXCEPT"
on mixins for base::Optional where it is not present for deleted
copy/move constructors, but present on base::Optional for defaulted
ones.

Bug: v8:8985
Change-Id: I54af77496657fde44292c050221d11533a54db03
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1518175
Commit-Queue: Simon Zünd <szuend@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60261}