The type stored in {Result} should not always be the same as derived by
the compiler for the argument to {Decoder::toResult}. If we pass in a
temporary, we most often want it to be stored by value, not by
reference.
This CL enforces this; if requirements change in the future, we can
remove the static assertions and think about how to protect against
accidental UAF when referencing a temporary value.

R=jkummerow@chromium.org
CC=mliedtke@chromium.org

Change-Id: Ia0449e6ed7342319799479b200af35660fccc6d7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3792115Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82115}