LoadHandler can also contain Code handlers (for StringLength and
FunctionPrototype).

Fixed: v8:12911
Change-Id: I2fd2dcb65a3283e9a748a1b1cf382f6eeef1f263
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3669253
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80777}