They're exposed via DevTools.

- [[PromiseStatus]] → [[PromiseState]]
- [[PromiseValue]] → [[PromiseResult]]
- [[GeneratorStatus]] → [[GeneratorState]]

Related CLs:

- Chromium CL temporarily disabling affected tests:
  https://chromium-review.googlesource.com/c/chromium/src/+/2203201
- Chromium CL re-enabling affected tests:
  https://chromium-review.googlesource.com/c/chromium/src/+/2202900

Bug: v8:10506, v8:5416
Change-Id: Id12fb0f2ba2b453139a5d74afff9021108c15f08
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2202984Reviewed-by: Simon Zünd <szuend@chromium.org>
Reviewed-by: Mathias Bynens <mathias@chromium.org>
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67825}