This reverts commit 26f10ecd.

Reason for revert: GC stress failures:
https://crbug.com/v8/11114

Original change's description:
> [torque] allow exported classes with custom C++ class
>
> Introduce a new annotation @customCppClass that can be used for
> non-extern @export classes, that is, generate everything, remove
> boilerplate from all the internal lists and switches, but allow
> a custom C++ class, which in turn also allows overwriting the generated
> print and verify functions.
>
> Port DescriptorArray and StrongDescriptorArray as an example.
>
> Bug: v8:7793
> Change-Id: I744e52fb4102ac49c0097f1c95bb17d301975bf0
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2489687
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
> Reviewed-by: Seth Brenith <seth.brenith@microsoft.com>
> Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#70989}

TBR=ulan@chromium.org,tebbi@chromium.org,seth.brenith@microsoft.com,nicohartmann@chromium.org

Change-Id: I4631db66a76f41cf62b400e8ee64df27e641a320
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7793,v8:11114
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2521911Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70994}